A lot of things have to come together to win a World Cup.

When evaluating the players, too little emphasis is placed on the individual. Reaction times are measured, stress situations are simulated, sleep behaviour is analysed, eating behaviour, how the body reacts - everything is available. The control over the players has got out of hand. They are judged on this data, albeit subjectively. That's madness.

We should integrate the quality of ex-players at the highest level more in football, especially in the youth sector. That is absolutely crucial for me.

As it is, in football if you are on top and winning games everyone wants to play well against you, put in more effort and beat you.

We know the history of players at Real Madrid and things are not easy at that club.

I have said in the past that I would be happy to see out my career at Chelsea. I moved here to play in the best league in the world with one of the strongest teams.

A player can't request on what position he wants to play, and it is the same with the captaincy. One should respect this, there are hierarchies.

When I moved to Chelsea, it was a big, big challenge and experience for me at the time to play with so many good players.

When you a buy a player like Ozil, you know his strengths and Arsene Wenger knows, I think, where he is at his best.

Sometimes a new coach can find it not easy.

I would have loved to have had a farewell match, and would have wanted the DFB to make that offer. But certain people did not plan that for me. I have to accept that.

I was on the lucky side of life.

For 17 years, I played at the highest level.

It is really difficult, after Jose Mourinho, to work at Chelsea. It could cause a problem for any manager because Mourinho had such a relationship with the players and the fans.

If you want to work as a coach for longer term you need consistency, trust in the club and also the environment around the club.

When I see Mario Gotze, his development does not go in the right direction. He has outstanding qualities, but he has not reached his potential for whatever reason. His charisma is not so good, fellow players, coaches, fans and the media do not feel that he is fighting against his current situation. He's more an introvert player.

I am always open to new ideas, but you can't always be right.

Mario Gotze is a great player, but one of my favourites is Marco Reus, who is a fantastic player, and one of the very best.

It is something very special when you can win a league title, because it is the one that you play all year for.

I want to prove myself at Chelsea and be successful in the Premiership and the Champions League.

At Bayern you need other characteristics to assert yourself. Just being good is not enough there.

Things aren't always full of sunshine, there has to be friction at times as well.

People have weaknesses, we should accept it.

The Premier League is a different kind of league, in terms of physical play.