I understood I had to be good at school so I could play football in my free time. Usually, by the time I came home from school, I already had all my things ready for the next day, so I could put my bag on the side and go straight out to play football with my friends!

You have to be consistent in your work, consistent in your performances, because, if not, then you might not have as many games as you would like. Less games you play, then less chances to have a clean sheet.

Iker Casillas is one of those keepers who always seems to be at his best in the really difficult games when he has hardly got anything to do but reacts when needed in those emergency situations.

I'm so focused on the game that I hardly understand what the people sing or shout or what they do.

I believe that the Premier League is the best league in the world, and having played in the Premier League for such a long time, it is to my advantage, and I know what to expect.

We won back-to-back titles in 2005 and 2006, and it was a fantastic achievement, a fantastic feeling. Once you experience that, you want to have it again.

I don't like running that much, and during the off-season, I have to do it, but if I can replace it with tennis, it is better.

You have to have respect for money, but sometimes you get people who stop thinking about their career, and for them, it is just a case of saying, 'Look at me. I have a lot of money now, and I can do whatever I want.' I wouldn't do that.

Obviously, I would very much like to see Cristiano Ronaldo back at Old Trafford.

I am a massive fan of Wayne Rooney, and it is nice to see him play in any position because he gives a 100 per cent. Not many players can do that and say they do that.

When I hit 35, there were things I couldn't do which I'd done previously, and they had been completely natural to me.

The thing about being a striker is you need to be lightning-fast.

Football is a team sport. I'm proud of what I achieved in my career, but I also know that I wouldn't have achieved any of it without the support of my team-mates. I played with great players, great managers, and in great teams.

Every player makes mistakes; every goalkeeper makes mistakes. Every manager does, every broadcaster - every person in life makes mistakes. But for goalkeepers, often when they make a mistake, it leads to a goal.

Joe Hart has come in for a bit of criticism, but it's only because he's the England goalkeeper, and he's not got any competition. It's always been like that; it's just the way the English media works. Joe Hart is a tough cookie, and he won't listen to any of that.

At the end of the day, it's 11 men versus 11 on the pitch.

With a club like Manchester United that have history and traditions, I think the manager at the club should respect that.

Guardiola has a way of playing; he has a system, and he sticks to that.

You have to bear in mind where Louis van Gaal has worked before. His self-belief is bigger than Jose Mourinho's.

It is painful to say that the best player you have is better off trying something new.

If you're a senior player, and you really want to make an impact in the dressing room, it's difficult if you have players there who are not as committed as you are and they have a certain status.

I want to see Pogba being a Manchester United player and being as good as everything else he does in life. He's absolutely brilliant on social media, and he's projecting himself to be this incredibly modern player.

I really want to get involved in football again at some point. I know I'm getting older, but my life has just turned out a different way after I retired from football.

In three weeks, you can improve a lot. You can train a lot. You can come up with a proper plan.