Evander Holyfield may be the only four-time world heavyweight champion, but the American's career story is inextricably linked with Mike Tyson.

Tyson biting off a part of his ear in their 1997 re-match remains one of the most shocking moments in sports history and that rivalry is the centre-piece of new ESPN 30 for 30 documentary Chasing Tyson.

It tells the story of Holyfield's quest to arrange the first fight with Tyson at a time when the 53-year-old had recently returned to the sport after retirement after being diagnosed with a heart condition.

Holyfield will be chatting to Ger on Off The Ball tonight and before he does, here are a few clips from Chasing Tyson: