S1, E3: Counting down the top 10 most controversial transfers in football, those who betrayed their club's fans by making a surprise move to a rival, like Sol Campbell's move from Tottenham Hotspur to Arsenal, those that set the scene for a rivalry, like Real Madrid and Barcelona's tug of war for Alfredo di Stéfano, and those with some murky deals involved, like Carlos Tevez moving to West Ham United.