Eurosport-Yahoo! blogger Simon Reed believes that Serena Williams is the best player in the world and sees her as the favourite for the Wimbledon title.

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• Serena eases through to last four
• Venus batters Radwanska
• Safina battles into first semi-finals
• Dementieva sets up Serena clash

Serena is playing some of the best tennis I've seen her play for a couple of years, in particular the first set against Victoria Azarenka in their quarter-final.

I think that Serena is the best player in the world by some way, but there is also something about grass that seems to bring the best out of Venus.

She is ideally suited to grass, and it's fantastic to watch. Her movement around the court is so good that she's on to everything quickly so she forces errors from her opponents, and her ground-strokes are consistently of high quality. She's just amazingly tough to beat.

Grass is so different to any other surface. Venus just has the knack for grass. Serena has the knack for everything, and when she's on her game it's just so difficult for the others.

I think that another final between the two Williams sisters is almost inevitable, given the way things have gone so far.

Agnieszka Radwanska went into her match against Venus comfortably the underdog as Venus beat her in Italy just a couple of months ago.

Venus moves so much better on grass than Dinara Safina, who she meets in the semi-finals, and I'd be surprised if the world number one even takes a set off her.

It seems as though Elena Dementieva is once again destined to be the bridesmaid and not the bride this year. The Russian just seems to lack the nerve for the big occasion, and a semi-final against Serena is certainly one of those.

Perhaps she will go into the match feeling that she has got nothing to lose, as Serena has the head-to-head advantage over her, although she did lose to Dementieva in the Olympic Games quarter-finals, a tournament the Russian went on to win. But the way Serena played today, she is the overwhelming favourite to win again.

I think Roger Federer could be run close by Ivo Karlovic on Centre Court when the men's quarter-finals get underway on Wednesday. Federer will really have to be on his game as the big-serving Croat will be tough even for the five-times champion to break. I can see a lot of tie-breaks in that match, and if Karlovic can take one of those breakers then he could give Federer a scare. It will be a tough match for Federer, but I can see him winning in four sets.

I think Andy Murray's reaction following his dramatic five-set fourth round win over Stanislas Wawrinka could go one of two ways; The late finish could prove to be a draining experience for him, both emotionally and physically, but on the other hand he tested himself when he wasn't playing brilliantly, and I thought there would be a moment or two in this tournament when Murray would struggle to find his form and put a lot of pressure on himself, but I thought he came through really well.

I think Murray will beat Juan Carlos Ferrero, who I don't think has the kind of game that will worry him. The kind of players who give Murray trouble are the ones who can really belt the ball at him, and Ferrero is not of that type. He's a very experienced player, he's a very thoughtful player, but I still see Murray winning, though he may drop a set.