17:00 - Thanks for joining us today for the Tour - be sure to return tomorrow for live coverage of stage five.
0km - No change in the GC with all riders safely crossing the line despite that huge pile-up. Yellow jersey Cancellara was right in the thick of things and could well have gone down - but avoided it.
0km - Greipel takes the win from Petacchi, with Veelers third, Goss fourth and Sagan fifth!
0.5km - Four Lotto riders including Greipel - but Petacchi is there too, and Goss. And Sagan.
1km - Lotto lead the peloton now - this is Greipel's to lose.
2km - Nightrmare for Cav, who is in a heap on the tarmac. Eisel went down too. And Hunter. About 10 or so riders hit the tarmac, and loads more were caught up.
2.5km - MASSIVE CRASH: Loads of riders are down, including Cavendish.
3.5km - The trio are caught and we're back as one. Dumoulin is the last of the three to concede the inevitable.
4km - The yellow jersey is one of the main riders leading the chase - and gaps are appearing in the peloton.
5.5km - Poels, Dumoulin and Chavanel have a very small advantage - it's going nowhere this.
6.5km - Dumoulin, Chavanel and one Vacansoleil rider - Wout Poels - are about 6 seconds off the front. Meanwhile Brice Feillu drops off the back, still suffering from illness.
7.5km - The initial three leaders are caught by the half dozen chasers - but the pack is closing in.
8km - Sylvain Chavanel is in this chasing group too - the Frenchman is only seven seconds down on Cancellara and fancies the yelloe jersey. Intriguing.
8.5km - Philippe Gilbert and Samuel Dumoulin try and jump clear in pursuit of Maxime Bouet, Jerome Pineau and Grivko. The three leaders will soon be caught.
10km - ATTACK: Andriy Grivko, the Ukrainian national champion, pulls clear of the peloton. The Astana rider prompts a few others to try and ride off the front as they pass under the 10-to-go banner.
12km - The three leaders have 40 seconds now. Arashiro, Delaplace and Moncoutie have been out since the first kilometre today.
14km - The safe money is on Andre Greipel or Mark Cavendish today, but you never know. There are a load of second and third tier sprinters out there - Van Hummel, Hutarovic, Petacchi, Boasson Hagen, Haedo, Sagan, Dumoulin, Freire, Bozic, Farrar for instance... Kittel looks to be still suffering from illness. Perhaps someone will have a long pop?
16km - The lead is down to 1:10 so it's a question of when and not if. Probably within the next 5km.
19km - Tom Danielson, Luis Leon Sanchez and Tony Martin all on the back - those riders, with their respective injuries, will soon become best buddies one would think.
20km - GreenEdge, Lotto and Katusha also lending a hand. The leaders pass the 20-to-go banner with 1:43 on the pack. The sun is back out.
23km - BMC are riding right alongside Team Sky, with Evans covering Wiggins' every move. The teams are beginning to form their little huddles as the finish approaches.
24km - The lead is down to 2:03 - which is exactly how much Arashiro trails Cancellara in the overall standings. His virtual maillot jaune is disappearing fast...
26km - Team Sky and RadioShack are on the front of the pack, with the odd Liquigas rider cropping up too. It will be interesting to see how Sagan fares today in a flat bunch sprint - not his kind of finish, but the youngster is on fire and his confidence is sky high.
28km - Japan's Arashiro looked to have a pop on his own, but his fellow escapees were not having it. The tree have 2:15 on the bunch and a bunch sprint looks inevitable.
33km - The leaders are riding along the banks of the Seine now. They have three minutes over the peloton. Nibali has rejoined, but some riders are dropping off the back, including Garmin's Tom Danielson, who yesterday suffered a separated shoulder in a fall and lost more than nine minutes.
35km - We talked to Tyler Farrar this morning about his prospects on 4 July. Asked about the stage and his experiences yesterday, the American said: "It's another sprint. It's going to be whoever's fastest. I'll have Robbie Hunter and David Millar to help me. I'm okay after yesterday - it was just one crash, the other time it was to help Vandevelde."
38km - Nibali still fighting back to the peloton. A small group has formed, including Peraud too. Nibali was riding in the slipstream of the BMC team car before he is waved on by one of the BMC directeurs sportif. RadioShack, meanwhile, are goign really hard on the front of the peloton, with Lotto lending a hand.
42km - CRASH: a touch of wheels in the peloton and a cluster of riders come down, including Vincenzo Nibali of Liquigas. The Italian is okay and has two men with him to pace him back. Jean-Christophe Peraud of AG2R-La Mondiale went down too, as did Saxo Bank's Jonathan Cantwell, who went right over the handlebars when the pace suddenly slowed. "F" shouts the Australian on the side of the road. He's one of 12 Aussies in the peloton - a record antipodean intake.
45km - The gap is now under four minutes now. Simon Gerrans is on the back, looking for his team car. The Australian rode into a ditch yesterday when trying to avoid some sprawling bodies on the road.
48km - They're through the worst of the rain, but there's a lot of water left on the road. The lead is 4:15 for the three leaders.
50km - There's a bit of a verbal joust going on between Jaroslav Popovych and one Katusha rider, possibly Karpets. It seems Popo didn't like the way his colleague was riding so close. And he seems to want Katusha to lend a hand on the front too.
52km - The leaders are being comprehensively soaked by a heavy downpour - and the chasing peloton are just about to hit it. Seems to be just a phase though - there's sun and blue sky on the horizon.
55km - The pace is very slow today and the race is well behind schedule. What's more, storms are forecast for the finish in Rouen, which could add an element of surprise to today's expected bunch sprint. Yes, here comes the rain right now... The gap is down to 4:45.
60km - Five-time Tour winner Jacques Anquetil won his first ever stage in Rouen, back in 1957. Meanwhile, off the back of the peloton, Edvald Boasson Hagen drops back to swap his yellow helmet for a closed-vent version. Apparently they save three to four watts per hour. Team Sky, of course, are wearing yellow helmets as the best team in the overall. The British team are still four seconds ahead of RadioShack and six ahead of BMC in the team standings.
65km - Of course, today is the 4th July so perhaps an American rider will try and win on Independence Day? The last man to do that was Garmin's Tyler Farrar last year. Farrar has been off-form ever since, mind, and so will find it tricky - especially without a lead-out train or the same speed as his main rivals.
67km - A couple of great facts for you from Infostrada sports: Only one rider has finished in the Top 25 in all four previous stages (including the prologue) of this Tour: Edvald Boasson Hagen. Of all three road stages, Marcel Kittel has finished three times among the last 10 of the stage result.
70km - Orica GreenEdge lead out the intermediate sprint for Matt Goss, who has Mark Cavendish in his wheel, with Renshaw and Sagan there too. Cav takes the points, with Goss, Renshaw, Sagan next, followed by Petacchi, Van Hummel and Hutarovich.
72km - Steven Kruijswijk of Rabobank needs a wheel change - and his mechanic takes almost a whole minute to get the back wheel on, much to the chagrin of the rider, who has a TV camera on him and a bunch of screaming French children waving Tricolor flags hanging around, getting their minute of fame.
74km - Arashiro takes the 20 points at the intermediate sprint at Fecamp ahead of Delaplace and Moncoutie. That's the third time a Europcar has won the intermediate sprint in four days.
75km - The lead is back above the seven-minute mark now as the leaders approach the intermediate sprint. Remember, Arashiro is the virtual yellow jersey - the Japanese rider is currently 2:03 down on Cancellara in the GC.
78km - We're getting close to the intermediate sprint at Fecamp, which will be uncontested for the three leaders, but will no doubt be rather animated six minutes later...
80km - We spoke to sprinter Matt Goss at the start. The GreenEdge rider said: "We have a really good lead out train and we're going to try and make the most of it. If there's points at the intermediate sprint we'll probably have a crack at it. But theres' still a long way to go until Paris."
82km - We've had a break on every day so far, but the following teams have yet to get involved off the front of the peloton: BMC, RadioShack, Lampre, Liquigas, Garmin, Sky, Lotto Belisol, Vacansoleil-DCM, Katusha, Rabobank, Movistar, Orica GreenEdge, Omega Pharma-Quick Step and Argos Shimano. It's interesting to see Vacansoleil in the list - they're usually one of the first teams to get involved, just look at the Giro, for example. Perhaps they see their strengths as coming in the proper hills?
85km - RadioShack's Tony Gallopin was leading the peloton, but has given way to Jens Voigt, who is there with his compatriot Sebastien Lang of Orica GreenEdge. Francis de Greef is there for Lotto Belisol too. The three leaders have 6:20 over the pack, so the lead has remained pretty constant over the past 100-odd kilometres.
90km - CORRECTION: It was Delaplace and not Moncoutie who took the point over the summit of the second climb of the day, the Cat.4 Côte de Dieppe. That means Moncoutie has just two points in the KOM competition - the same as Ivan Basso and Peter Sagan.
95km - Stunning scenary here in Normandy - jagged cliffs with numerous arches, with attractive beaches and some opal-coloured sea. The lead has dropped down to 5:40. Lotto, RadioShack and Katusha are on the front of the pack, with a few GreenEdge men for good measure.
100km - Simon Gerrans was involved in a crash yesterday, riding into a ditch and then coming to rest in a barbed wire fence. "Luckily it wasn't too serious, I didn't break any bones and I could finish the stage. My arm was caught in the fence and I had to get someone to help me to free it. I have some big scratches - a bit as if I had been attacked by a wild cat. I'm a bit disappointed because there won't be too many oppotunities for a rider like me in this Tour."
105km - A reminder of the situation: three leaders - Yukiya Arashiro (Europcar), David Moncoutie (Cofidis) and Anthony Delaplace (Saur-Sojasun) - have 6:25 over the peloton after breaking away at the outset of today's stage, the second longest in the Tour.
110km - The last time the Tour finished in Rouen was back in 2002 with the Finn Jan Kirsipuu. And here's a good fact for you, from Infostrada sports: Saur Sojasun is the only team this Tour de France that has not earned any money yet. If the break stays ahead, and reaches the Super Sprint, Saur will earn their first Euros. The winner of the Sprint takes 1500€. The number 2 earns 1000€, while the number 3 earns 500€.
115km - It's energy gel and banana time for the peloton, who pick up their musettes next to a batch of wind turnbines. They are hardly moving at all - which shows how favourable the wind is today. This stage was potentially one for trouble in the hand book, but the clement weather has made today something of a transitional affair.
120km - The riders have passed through the feeding zone. It has to be said, this is a very uneventful stage.
122km - There's a whole host of riders off the back, including a cluster of BMC riders, Astana, Sky (including Wiggins) and Katusha. There's no concern though, so perhaps it was just a group decision to take a call of nature besides the road. Either way, they're almost back with the peloton, which is being led by RadioShack and Lotto. The three leaders still have 6:30 over the pack.
125km - It's a bright sunny day in north France today with temperatures in the early 20s. The wind is not as strong as feared, although it is notoriously strong around Fecamp, the location of the intermediate sprint.
130km - Jose Ivan Gutierrez of Movistar is back with the medical car for some assistance, while Johnny Hoogerland of Vacansoleil-DCM is off the back of the peloton to pick up water bottles. His team-mate Kenny Van Hummel will hope to prove himself in the sprint today - although he'd be best to stay clear of Mark Cavendish, who had a go at him for dangerous sprinting at the intermediate yesterday.
132km - The lead is up to 7:30 for the three escapees. They're onto the amazingly stunning cliffs on the Normandy coast.
138km - Brice Feillu is the last placed rider on the GC, the Frenchman currently a full half-hour down on Cancellara in the overall standings. Yesterday he rolled home in last place, 16 minutes behind Peter Sagan. The reason? He has gastro and flu, and had a temperature of 42 degrees a couple of days ago. "I know that come the weekend, this will just be a bad memory. I aim to do well at the Planche des belles Filles on Saturday," said the 2009 Tour stage 7 winner at Andorra-Arcalis.
140km - Moncoutie makes it three from three over the third summit.
142km - Straight away the leaders are onto the third of four climbs, the Cat.4 Côte de Pourville-sur-Mer, a 1.9 kilometre-long climb at 4.4%. The lead is 6:45.
144km - David Moncoutie (Cofidis) took the point again at the top of the second climb. If he keeps this up, he'll be in second place in the polka dot standings tonight.
146km - The leaders are onto the second climb of the day, the Cat.4 Côte de Dieppe, a 1.8 kilometre-long climb at 3.9%. The lead is down to seven minutes.
150km - Eurocpar have fears over Thomas Voeckler after the Frenchman struggled yesterday with a knee injury that he picked up during the Dauphine. Voeckler wasn't involved in any of the crashes, but he was dropped off the back of the bunch and then held up with the numerous accidents. He told the French media that he has a stabbing pain in his knee which stops him riding out of the saddle. "I'm not the kind of guy who will give up," he promised after losing more than seven minutes.
155km - The lead is still over eight minutes for the three escapees, who are riding exactly 5km up the road from the peloton, which is now being controlled by the RadioShack team of yellow jersey Fabian Cancellara.
160km - Rogers himself has been involved in numerous crashes in the race so far but he believes the nervous nature of the race is normal and that "soon the peloton will find its rhythm". The Australian remains upbeat about the Tour, saying the focus will shift today after a tricky day in the saddle yesterday. "Today, we expect a sprint: Bernie and Bo will be there to work for Cav. I hope they'll be able to get there without any problems and then they'll be capable of winning another stage for us."
162km - Belorussian Kanstantin Siutsou became the first rider to abandon the race yesterday after breaking his tibia in one of the many falls. Siutsou was one of Bradley Wiggins's key support riders at Team Sky and it remains to be seen if the Briton's attempt at winning the GC will be affected by the fallout. This is what Mick Rogers had to say: "It's a blow for the team because he was an important rider for us in the mountains and he's capable of riding over all terrains."
164km - The lead is 8:15 for the three escapees, who broke clear right after the official start this morning after Japan's Arashiro made the initial break.
166km - Yukiya Arashiro is the only Japanese rider in this year's Tour - and in 2009, he became the joint first Japanese rider to complete the Tour alongside compatriot Fumiyuki Beppu. Europcar's Arashiro is the current Asian road champion and is riding his third Tour de France.
168km - From a rider approaching the end of his career to one just at the start: 22-year-old Anthony Delaplace was the Tour's youngest rider last year. The Saur-Sojasun rider featured in three breaks and finished 135th in Paris. The Frenchman was part of the break in stage one in this year's race, which was reeled in before Peter Sagan's win in Seraing. Delaplace is a former junior national champion with two UCI wins to his name: 2011 at Polynormande, and the 2010 Tour de l'Avenir.
170km - Now is as good a time as any to start our closer look into the three leaders. As just mentioned, Frenchman Moncoutie is a climbing specialist who has won the Vuelta polka dot jersey for the last four years. The 37 year old achieved the feat with similar tactics each year: a long early break in the mountains - and in each race, he also won a stage. He's also a double Tour stage winner from back in 2004 and 2005. This is the famed recluse's 11th Tour.
175km - David Moncoutie (Cofidis) crosses the summit of the first climb in pole position. He's won the polka dot jersey in the Vuelta for the previous four consecutive years so the French veteran - known as The Postman - knows a few things about climbing.
176km - The average speed for the first hour of racing today was a relatively slow 37.6km/h.
177km - The leaders are onto the first of four minor climbs, the Cat.4 Côte du Mont Huon, a 2.1 kilometre-long climb at 4.1%.
178km - This is what Sagan had to say about his celebration yesterday: "The other evening my teammates and I decided that if I won again, I’d do it like Forrest Gump: when they told him to run, he ran; when they tell me to win, I win. I like doing something that makes people smile. When I watch sport on the TV, I’ve always liked it when someone adds a touch of fun to their victories, like Valentino Rossi does. Now that I’m winning, I try to do the same thing." Got to love this young tyro!
180km - The Lotto Belisol team-mates of Andre Greipel are on the front of the peloton. The German is the big favourite for the win today. He has the best lead-out by far, and he will be disappointed at losing out to Mark Cavendish on Monday.
185km - Finally, in the white jersey youth standings there are no changes, with BMC's Tejay van Garderen leading Sky's Edvald Boasson Hagen by one slender second. Cofidis' Rein Taaramae is third, 12 seconds down, and Peter Sagan fourth, at 13. Safe to say, if there were bonus seconds for winners then Sagan would not only be in white, he'd probably have the yellow too... White jersey standings
188km - The lead is up to 8:20 for the three escapees. We'll take a closer look at them in a bit, but let's continue with our jersey run down. Dane Michael Morkov (Saxo Bank) is taking a day off today after featuring in breaks for the past three days. He's done enough to secure the polka dot jersey for a few days, so chapeau to him. Morkov has nine points in the KOM competition, with Liquigas pair Sagan and Ivan Basso both on two. There are just four points up for grabs today. http://uk.eurosport.yahoo.com/cycling/tour-de-france/standings/mountain.html
190km - Peter Sagan leads the green jersey points competition. The Slovak sensation has 116 points, with Fabian Cancellara second on 74 points and Mark Cavendish on 73. With just three men up the road today, there will be a fierce battle for the intermediate sprint - plus the stage is likely to end in a bunch sprint too. Either way, unless Cav takes maximum points and Sagan picks up next to none, the green jersey will stay on the shoulders of the Liquigas tyro tonight. Green jersey standings
195km - The three leaders now have 7:20 over the peloton, which is taking it easy after yesterday's turmoil on the way to Boulogne. Yesterday, Peter Sagan won his second stage and kept us entertained with a funny Running Man-style dance over the line. What did you think of his actions? Many riders and commentators feel the 22-year-old is showing no respect to his older peers - although most people just think he's enjoying the moment and having a bit of fun. Blazin' Saddles: Showman Sagan shot down
200km - There were other casualties yesterday: Dutchman Koen de Kort (Argos-Shimano) crashed and hurt his thumb. His team-mate Marcel Kittel is still recovering from gastro - something that has hit Frenchman Brice Feillu (Saur-Sojasun) too. The former Tour stage winner is currently the lanterne rouge of the race after a testing start. Feillu finished half an hour down on Sagan yesterday. Katusha's Giampaolo Caruso, Euskaltel's Pablo Urtasun and GreenEdge's Simon Gerrans also fell hard.
205km - Of the three leaders, Arashiro is the best placed in the GC - 2:03 down on Cancellara. With the lead now approaching five minutes on the road, that makes the Japanese rider the virtual maillot jaune.
208km - No change in the overall standings yesterday for the large part - despite all those crashes. Philippe Gilbert lost seven odd minutes so drops way out of the top ten, allowing his team-mate Cadel Evans to ride to seventh, 17 seconds down on yellow jersey Fabian Cancellara. Bradley Wiggins is still second, seven seconds down alongside Sylvain Chavanel of France. General classification
210km - The three leaders - Arashiro (EUC), Moncoutie (COF) and Delaplace (SAU) - have 2:35 on the peloton. This is the fourth attack in as many days from Europcar, who are riding the kind of race this year that FDJ rode last year.
214km - ATTACK: Japan's Yukiya Arashiro (Europcar) goes on the offensive right away. He's followed by David Moncoutie (Cofidis) and Anthony Delaplace (Saur-Sojasun).
215km - So, with three less riders than yesterday, the peloton starts this fourth stage. 195 riders remain in the race - and they're off.
11:20 - Stage three took its toll, however, with numerous crashes ending the hopes of many. Withdrawing straight away were Sky's Kanstantin Siutsou (broken tibia) and Movistar's Jose Joaquin Rojas (broken collarbone). Rabobank's Maarten Tjallingii finished the stage more than 10 minutes down despite riding the last 40km with a broken hip. The Dutchman has since abandoned the race. Thomas Voeckler (Europcar) hurt his knee, Tom Danielson (Garmin) damaged his shoulder too.
11:15 - Yesterday, Peter Sagan took a superb second win on his debut Tour de France with an imperious display to take stage three in Boulogne-sur-Mer after a frantic uphill finish. The Liquigas all-rounder was untouchable in the climax to a chaotic 197km stage through north France, beating Norway's Edvald Boasson Hagen (Team Sky) by a few bike lengths after a typically explosive finish. Stage three report: Sagan strikes again
11:10 - Welcome to live coverage of stage four of the Tour de France, a long 214.5km ride from Abbeville, along the coast, and then inland to Rouen. There are four Cat.4 climbs but it should finish with a bunch sprint - ideal for the likes of Mark Cavendish and Andre Greipel.