1. Roy Keane & Alf-Inge Haaland
Source: Independent
Keane makes another appearance with his most hate-filled rival. 1997, Keane attempted to tackle Haaland and ended up injuring himself. Haaland believed he feigned injury to escape punishment. 2001, Keane tackled Haaland’s knee, which he never fully recovered, and Keane maintains it was an act of vengeance that he does not regret.