Now that sports science is more advanced, we know that there are so many off-pitch factors that can affect how good you can become. If people are telling you to sleep a certain number of hours, eat specific foods, and drink a certain volume of fluids, then you have to be prepared to listen and learn.
When I was younger, I had some close friends who always loved European football, and Real Madrid at that time were the dominant force. I remember family holidays when we used to go to Spain, and we'd bring back replica shirts of Real Madrid and pretend to be the players when we played in the park.
Whenever I get days off, I go home, or friends and family come up. I'm in contact with them every day, so it's like we live next door, but obviously we live in two different countries. Football is my job, and everyone around me has given me the opportunity to purely concentrate on football, and everyone else worries about everything else.
When you play in the Premier League, say you're playing against a lower-end team, they set up to defend all the time, they set up to block you off. But when you play in the Champions League, all the other teams are used to winning every week, so it's more of an open game, it's more attacking, end-to-end.