Former heavyweight champion Mike Tyson and YouTuber-turned-boxer Jake Paul are set to fight in a live boxing match streamed on Netflix Friday, in what would be Tyson’s first sanctioned match in nearly 20 years amid rising concerns about the 58-year-old’s age and safety.

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

Tyson’s readiness for the fight has sparked both excitement and concern, as Paul, at 26, is more than 30 years his junior. Despite the age gap, Tyson has reassured fans that he’s in prime condition and mentally prepared, having overcome a history of substance abuse that clouded the later years of his boxing career.