10. Sol Campbell (Tottenham and Arsenal)
Sol Campbell was one of the best players of Tottenham and was their star, and the fans loved him because he was their hero. However, this hero would later turn out to be the villain as Campbell decided to move out of club to win a Champions League. He could have chosen any club he wanted to, but he decided to play for Arsenal. And that is not all, he could have at least helped his club gain some money out of this transfer, but he decided to deny any contract extension with Tottenham and went on for a free transfer! He made a ton of money with the transfer and Spurs were left with nothing but regret.