"I'm pretty tough in one-on-one situations, I always try to win the ball. I think that English football is a bit different to Spanish football. It's more physical in England, but it's different here and I'll have to adapt. I don't think my style of play will change that much, but I will have to improve."
Song faces tough competition from the likes of Sergio Busquets and Javier Mascherano in Barca's midfield.
"There are a lot of games every season when you play for Barca, and I said that I would give it my all because if the manager believes in me he'll give me chances to play. The best players in the world play for Barca, I'm very proud to be here and I hope to play as many games as possible."