Bayern are known for their collective work, which is very important.

It begins defensively. Then they move play very quickly, down either flank. You have Thomas Mueller, Franck Ribery and Arjen Robben.

You can't forget what Philipp Lahm brings to the game as well with his vision, the quality of his runs.

His wonderful collective action against Barcelona shows how Bayern recuperate, they win the ball and turn defence into attack so quickly - the transition is stunning.

They are a really, really balanced team. They don't have a real weak point.

There are some weaker points, but you can't really

Chelsea are the logical favourites in the Europa League final, but Benfica have great players.

I saw their two matches against Newcastle - they have an excellent defence and a lot of quality in attack, such as through Nicolas Gaitan and Oscar Cardozo.

Cardozo is a less creative player but has a great physical impact on opposing defences. He's never 'out' of a match and always plays with the will to physically 'kill' his opponent - the first little mistake made by the opposing defence and he will benefit from it.

Gaitan is superb individually and as a team-mate, able to score goals and pass

I think Chelsea currently have a great coach in Rafa Benitez, but if they part ways at the end of season, of course Jose Mourinho would be a good solution for Chelsea.

Mourinho is one of the best in the world. But I consider Benitez to be doing a good job at Stamford Bridge.

Honestly, I'm not really well informed about the possibility of Mourinho returning to Chelsea. Usually, I'm not a big fan of these kind of rumours, but that's what we get used to reading in the newspapers.

I'm afraid of what Chelsea can do in the summer. We have to be prepared for them to be one of the biggest movers in

Ahead of another busy weekend of European action, Arsenal boss Arsene Wenger gives his expert view on the semi-finals of the Champions League and Europa League.

Wenger tells us that he believes Barcelona should not be written off against Bayern Munich despite a below-par European campaign.

He also things that the other semi-final between Dortmund and Real Madrid is a real 50-50 clash that could go either way.

In the Europa League, Wenger says that says people assuming Chelsea will cruise past Basel to reach the Europa League final may need to look again.

And finally, he tells us he'll be

If Celtic and AC Milan both beat Barcelona, that means it is possible for Paris Saint-Germain. They should draw inspiration from this because Barcelona are not unbeatable.

Arsenal have played three times against Barcelona over the last seven or eight years. I think that they still have the best technical skills, but they have lost something.

They are more vulnerable in defence and I know PSG have the offensive ability to take advantage of this little vulnerability that Barca haven't had in previous seasons.

If you stop Lionel Messi do you stop Barcelona? Probably, because he is involved in

Bayern Munich fans before the first leg at the Emirates Stadium (Reuters)

Arsenal boss Arsene Wenger believes that Bayern Munich are "clearly superior" ahead of their Champions League tie second leg.

The Frenchman was mightily impressed with the way Bayern played during the first leg at the Emirates, a match the Bavarian side won 3-1 to assume control of the tie.

Wenger says he cannot get away from the fact that Bayern are a high quality side and he knows his own team have an extremely difficult task on their hands if they are to qualify from the last 16.

Yet despite history and recent form going against the Gunners in Munich on Wednesday, Wenger still harbours

If only the second leg match of Celtic's Champions League tie against Juventus was in Glasgow, then perhaps we could imagine Celtic being able to create an upset.

But in Turin, there's no way. It's so difficult because there is too big a gap between the teams, despite Celtic holding their own in the first leg at Parkhead.

The final score in the first leg was probably a bit harsh given Celtic's performance, but Juventus have the genuine qualities of a typical Italian team: very good defensively, well organised, efficient and dangerous on the attack. Celtic rapidly ran out of ideas when faced

Ronaldo and Rooney face off again
Real Madrid have certainly got enough quality to score against Manchester United. But when United play at home, they are an efficient machine.

So it is a game full of promise. I still think Manchester United have a little bit more of a chance because they would go through with a 0-0.

That means Madrid will be forced to attack, no matter what happens, whereas United are very good on the counter-attack and have more options from the beginning because of the away goal.

When Dortmund play at home they are a machine. They play at a very high physical rhythm - so I predict several problems for