I think that football has changed, it has become more complex. For example, it's faster, you have less free space, and you have to play from such small spaces.
I think, in today's football, you have to have a certain degree of technology. If not, you're living in the stone ages.
Maybe modern tactics mean that making the switch from defence to midfield is easier. Many years ago, full backs were more limited - you were just supposed to defend, and it didn't matter if you could get forward too.
I will never close the door to the national team on anyone, but you also have to remember that in modern football, only players who are in peak physical condition can make the most of their technical abilities.
I know the questions will be around the money, the amount Chelsea had to spend to bring him here but that's the reality of modern football. Big teams only want big players, big players are in big clubs, big clubs want to keep their big players.
In modern day football, you've got to play in different positions. I've played in numerous positions, apart from centre-back and goalkeeper, I think.
Modern football is increasingly dominated by the coaches - their narcissism to put themselves above the team and their players.
I feel like, City, because they're this modern global team, in the United States we think they're a really big club. But here in Manchester, it's not a big club.
Zlatan is one of the best strikers in the modern generation.
Football and chess can seem like sporting polar opposites, but there are so many similarities with the modern game.
Modern football tends to bring out the narcissism of those who sit on the bench.
Football has evolved, you can't compare with the past.
The arrival of Arsene Wenger in 1996 certainly heralded a change in English football. He was very successful very quickly, and suddenly, all the talk was about his revolutionary new training methods.
I still try to treat football as a game even if there are now other considerations at stake, especially economic ones.
The reason Ozil has as many detractors as supporters is he is a bit of an anomaly - an elegant, skilful footballer who at his best evokes memories of the great number 10s from the past, but sometimes looks unsuited to the extra demands of a changing game at the very top.
If you look at football over the last 50 years there has been a gradual decrease in goals, you don't see too many 10-nils these days, but two, three or four goals per game is a good spectacle.
I don't recognize myself in the players I see today. There's only one who excites me, and that is Thierry Henry. He's not just a great footballer, he's a showman, an entertainer.
Times have changed. Football has changed.
I do wonder how managers like Brian Clough and Bill Shankly would cope. How would Cloughie deal with players taking five pairs of different colour boots to a game?
Obviously we've got a lot of science behind football these days and we've got a lot of people that can advise us on how best to look after our bodies.
Football today means players stay less now than ever before and you have to accept that. As a manager, a big part of your business is doing far too much business that you don't want to do really.
The world is changing, football should definitely too.
Looking at the way the game is played, I'm envious of the conditions. We played on some ropey World Cup surfaces. I genuinely never look back and wish I earned the money they do today, but I do think of that element.
Cruyff defined a philosophy and a style of how we had to play: positional play, type of players, the profile of the coaches, even.
Once, players came to football expecting to be wealthy when they retired. Now, they expect to be wealthy before they've played their first game!
