Former 147-pound world champion Devon Alexander will battle rugged contender Walter Castillo in the main event of Premier Boxing Champions TOE-TO-TOE TUESDAYS on FS1 and BOXEO DE CAMPEONES on FOX Deportes Tuesday, Nov. 21 from The Coliseum in St. Petersburg, Florida.

The 10-round bout will headline a show promoted by Warriors Boxing and Fire Fist Boxing Promotions and features a 10-round co-main event between unbeaten welterweight prospect Miguel Cruz against once-beaten David Grayton. Two of the fighting Russell brothers, Antonio and Antuanne, brothers of featherweight champion Gary Russell Jr., will enter the ring in separate six-round matches.