2. Alex Song (Cameroon):
Another player who made a high-profile move to Barcelona is the 29-year old Alex Song, who is currently playing his trade with Rubin Kazan. He had an incredible run in the first team at the Emirates from 2007-2012 and his performances for the English outfit saw Barcelona make a move for him in 2012.
Song started his career in Spain in fine fashion helping his team to a victory in an El Classico on his debut but he managed to stay at the club for just another year with Barcelona having a midfield of Iniesta and Xavi, leaving him no place in the side. He made 39 appearances for the Spanish giants before being sent out on loan to West Ham and he has failed to get back to his best as his stint at Barcelona spoilt his entire career.