Arsenal boss Arsene Wenger says Alex Song will be a star for Barcelona.
Wenger believes his former protege will come into his own under Tito Villanova's stewardship.
Wenger, whose side thumped Coventry 6-1 on Wednesday, told BeIn Sports: "He will succeed at Barca, and something tells me that he will play in central defence.
"No matter who's by his side, he will be good in this role."