
24. Alex Ovechkin vs. Evgeni Malkin
It’s unclear exactly when these Russian NHL stars first began to hate each other because they were actually friends. In 2008, they were top scorers in the league and even roommates during the Olympics. Their relationship was close until it wasn’t. Soon they were the worst enemies.

Ovechkin allegedly punched Malkin’s agent in a Moscow nightclub, igniting the feud. From then on, practically every time they faced off against each other, there was some kind of violence. Both men played their part in this messy feud. It also interfered with their international form.