I'm a professional. I have to do my best.

I admire Arsenal and the philosophy that the young players have. Liverpool, with their Spanish players, they also have an incredible squad. And Manchester United and Chelsea are teams that are very big, like Real Madrid and Barcelona, with money and incredible players.

Through Common Goal, we're creating a collaborative way for football to give back to society.

I always said I was very grateful for Chelsea. I spent an amazing time of my career there, we won a lot of trophies, and I think I became a better player. I have great friends in the club, and I always wish the best for them.

Football is not always as glamourous as some might imagine, as the story of the first time I signed Marouane Fellaini perhaps illustrates.

In tennis, there is the forehand, the backhand, the overhead smash and the drop volley, all with a different grip.

Fans give me abuse all the time. Nearly every team does that. If I wasn't a good player, you wouldn't feel like you need to boo me the whole game. So do that if it makes you feel better, but it does spur me on. It's like, 'You expect something from me; that's why you're doing this,' so I don't mind it. They can boo me all day long, really.

It's an enjoyable sport; we all love to play the game, and fans love to support it.