WERE ARSENAL CORRECT TO SELL THOMAS VERMAELEN TO BARCELONA.?

Arsenal sold their Belgian footballer Thomas Vermaelen, who played as a defender to Barcelona, for sixteen million pounds. Even when Manchester United were indeed very keen to buy him for the same amount of money. People questioned the Arsenal decision then. But He has not played a single game for Barcelona, but he has now gone under the knife, and will be out for a few weeks at least.