Song: "I have two sons and they admire messi. They talk about him day in day out. I couldn't refuse this offer. Everything went really fast"
"I want to thank Arsenal and the manager, Arsene Wenger, for having helped me to get here"
"Messi is the best player in the world. Until now, I could only watch him on tv, now i'll be able to play with him."
"I know this a team full of quality players, so it's up to me to learn and to compete for a spot in the team."
"People comparing me with former Barcelona player Yaya Toure? We are different players, we each have our skills."
"Playing the Super Cup? If the coach wants me to play, I'm ready for that. Would be great to play the Super Cup against Madrid."
"I didn't come here to take Busquets' place, he's the best defensive midfielder in the world . I come here to help the team."
"I can play at centre back too, played there a few times at Arsenal. I'll play where the coach wants me to play."
"The Camp Nou is a magical stadium. I already knew it from playing here with Arsenal, but having it as home ground must be fantastic."
"When you arrive in a new country you have to do all you can to integrate. I plan to learn to talk some Catalan."