Michel Rivera vs. Frank Martin: A pair of rising undefeated lightweight contenders will clash in a high-level crossroads main event as Michel “La Zarza Ali” Rivera battles Frank “The Ghost” Martin from The Chelsea inside The Cosmopolitan of Las Vegas. The winner puts themselves one step closer to a world title opportunity in the stacked 135-pound division. Plus, former world champion José Uzcátegui returns to action against unbeaten former amateur standout Vladimir Shishkin and bantamweight contenders Vincent Astrolabio and Nikolai Potapov face off. Live on SHOWTIME.