9) Alf-Inge Haaland (Manchester City)
Keane lunged in to snatch the ball away from Haaland, but instead damaged his anterior cruciate ligaments. Alf-Inge approached the downed Irishman and blasted him for his attempted foul. Keane looked to seek revenge three and a half years later, hammering him with a high boot straight to the knee. Taunting the crippled player was bad enough, but the aftermath was sickening, as he showed no remorse.