10. Nemanja Vidic
Nemanja Vidic was a January transfer player and was bought during the winter of 2006. When he came to Manchester United, he was found to be too weak to play as a defender in Premier League, let alone Manchester United. However, with a few weeks of training, Vidic went on to become one of the greatest signings of Manchester United and would become the great rock wall at the back. He went on to become one of the strongest defenders in the Premier League and had great capabilities in the air as well. He was a genuine threat when it came to scoring from corners.