Of course I would return to Real Madrid once I win all there is to win with Chelsea and after a long and successful career at Chelsea.
The day I signed for Chelsea, I had to go around the world - from Los Angeles to Singapore, through London - and I trained. Difficult.
Wolfsburg might be a smaller club when you look at reputations and I thought about it long and hard. I could have stayed at Chelsea. Mourinho told me that I would get my chance. You have to make a decision, though, and in the end I only wanted to play football again.
I had a good time at Chelsea and was accepted in the team, so it's difficult to explain why I left. My performances were good as well, but there was a time in my second season when I felt I didn't have the manager's trust any more and I didn't play many matches from the start.
I definitely did not fail at Chelsea. I always had my chance, scored important goals in the first season. At the end I just wanted the transfer, although Jose Mourinho wanted me to stay.
I love Chelsea still. I'm not frustrated; it was a great experience.