Tyson, the former undisputed heavyweight champion, has not fought a professional fight since 2005 when he retired in his corner in a bout with Kevin McBride. While troubles plagued his life, including three years in prison after being convicted of rape in 1992, Tyson has rehabilitated his public image over the past decade.

1. Rounds: Instead of the normal 10 or 12, they’ll fight in eight rounds. 2. Round times: Instead of three minutes in the ring, they’ll fight for two minutes in each round. 3. Special gloves: They’ll both wear 14-ounce gloves. Normally, boxers wear 10-ounce gloves in heavyweight fights.

There are three days until the much-anticipated boxing match between Mike Tyson and Jake Paul. Here are the sanctioned fight rules explained.