Jake Paul is underestimating Mike Tyson, according to someone who's been closely working with the boxing icon in the build-up to tonight's spectacle. Cruiserweight boxer Mike Russell joined Tyson's camp for a second time ahead of the huge fight in Texas and has seen close hand how ready the 58-year-old is to get back in the ring.

But one man who earned an invite was Tyson’s fellow Brownsville native Bruce Carrington. The featherweight prospect had paid tribute to ‘Iron Mike’ with a promo after one of his recent fights in Madison Square Garden, and clearly excited the legendary former heavyweight champion.

Mike Tyson and Jake Paul will face off at the AT&T Stadium in Arlington, Texas, USA under modified rules that include heavier gloves and shorter, two-minute rounds. On Friday (), Iron Mike will step into the ring to face the 27-year-old YouTuber,