Fight day has arrived for former champ Mike Tyson and YouTube star Jake Paul. What started out as another Paul fight against a retired or aging professional — with money as the main motivation — is now looking a lot like a grudge match.

Jake Paul and Mike Tyson are set to fight in a major professional boxing match tonight. Here's how to watch and what time the bout starts.

Once known as "The baddest man on the planet," former heavyweight champion "Iron" Mike Tyson (50-6, 44 knockouts), is returning to the boxing ring Friday to take on YouTube star-turned-professional fighter Jake Paul (10-1, seven knockouts).