Most of the clubs who have had success against Barcelona have relied on a highly organised and disciplined defence.
He's an incredible person. Messi is not simply a uniquely talented footballer. He's also strong mentally, very bright, and exceptionally dedicated to his job. Personally speaking, I enjoy watching him play, and I'm deeply proud of him and what he has achieved. Quite simply, he's the best.
I'm grateful for everything I have achieved in football, but now I'd rather do other things, go and watch games and enjoy discussing them afterwards.
As a player, you are more concerned with the moments when you have possession of the ball or are about to receive the ball. You are watching your team-mates and trying to decide what the possibilities are.
When you are a coach, you are watching how the team is positioning itself on the field - if your team is in possession of the ball, you are already anticipating what could happen if you lose the ball.
The evolution of football has seen a reduction in the space between the teams. It is therefore important for the modern footballer to react and be quicker than in the past, because there is more happening in the restricted space.
Manchester United is a world-famous club, and yet if you say, 'Manchester United,' then immediately you think of Sir Alex Ferguson. To have achieved so much and have so much importance at such a big club is extremely rare.
It's normal that if you are working with a lot of people, then you have a lot of different mentalities and characters. You have the serious guy, and you have the one who is always complaining and the one who is always talking. Everyone is different.
Every manager feels a responsibility to his board of directors and the public and the players.