There's nothing like a long running, highly charged (and often irrational) feud to stoke things up in the world of sport.
Andy Cole revealed in yesterday's Independent his detest for former England and Manchester United team-mate Teddy Sheringham. The basis of the feud? Sheringham snubbed Cole by refusing to shake hands as the former Newcastle player made his England debut.
In that one moment, a feud that has lasted 15-years began.
Here, we highlight some classic bitter relationships, where there was not only rivalry, but a true hatred between the parties involved.