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.

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,

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.