His first English club were the Trotters and he reflected on how some friendly faces helped him settle back then.
"That was difficult in the beginning," the 27-year-old tells Chelsea Magazine. "I had lived all my life in my house with my family and I didn't know what it was to live away and be alone a lot of the time. It took me a little bit of time to understand that. It was completely different to Spain, but it was very important for me to learn this, not just to grow as a player, but as a person as well, and I have great memories from that time.
"I was living close to the stadium, on the training ground, where I was working every day, and then I used to go to Manchester. I met some new friends there and I hung out with some of my team-mates – I remember Stuart Holden and Ivan Klasnic were very, very important in the beginning because they treated me as a young brother and they took good care of me.
"I also had friends coming from Spain to see me and my family has always been important for me. They tried to help me out as much as they could from another country, which is not easy, and they came to visit me as well – my dad used to come to the games."