Messi is so good that he can win La Liga even with a mediocre team, which is not the case. Barca remain up top every year because of him.
I've had some of the best years of my career at Atletico and remember the supporters, my teammates, and the coaching staff fondly.
Speaking about Mourinho is always controversial, and there's always some intrigue surrounding him. But he is an awesome coach who tries to take the maximum from each and every one of his players.
When Atletico tried to buy me back, I did everything I could to make it possible. I had offers from clubs in France and Italy, but I would not have left Chelsea for any other side - only for Atletico Madrid.
When you work with Mourinho, you have to know that the group, the collective is above the individual.
He always scores the opening goal. Because it is one thing to score 30 goals with hat-tricks in easy wins, and another that 20 of those 30 goals are enough to win 1-0. Nobody does that as well as Diego Costa.
It's true I wasn't as important at Chelsea. I never demanded that. What I wanted was to be a champion, because few people get that. I succeeded. But the happiness wasn't there.
Playing with Coutinho is easy. He's a very quick player who dribbles well. He knows how to play out wide, and my job is not just to go past and help him: it's also to give the greatest number of passes to him in space around the opposition right-back.
When you're not playing, sometimes you're not full of confidence.
It's not easy playing against Barcelona in the Champions League. They are a club with a lot of history.