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.

The Mike Tyson vs Jake Paul captured the imagination of the fans with all eyes on the epic Netflix fight on November 15, Friday. However, as the dust settles with Paul getting the win over Tyson, many are left to wonder if it was nothing more than a glorified sparring session.

Many fans might not yet know Mike Russell, the Petaluma-based cruiserweight who’s now spent two training camps with Mike Tyson over the past four years—including the current one, leading up to Tyson’s upcoming fight against Jake Paul.