Photos: Devon Alexander, Walter Castillo - Ready For Battle

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 DECAMPEONES on FOX Deportes Tuesday, Nov. 21 from The Coliseum in St. Petersburg, Florida with televised coverage beginning at 8:00 p.m. ET/5:00 p.m. PT. Photos by Douglas DeFelice/PBC

Alexander was 146.8-pounds, while Castillo came in at 146.2-pounds.

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.

Tickets for the live event begin at $35 and are on sale now. To purchase tickets visit www.ticketmaster.com.

"This show is packed with talent and should deliver a great night of boxing for fans in Florida and watching on FS1 and FOX Deportes," said Leon Margules, President of Warriors Boxing. "Devon Alexander is a former two-division champion on the comeback trail and he'll be tested by Walter Castillo, who is always in exciting fights. Miguel Cruz and David Grayton are both hungry prospects looking to raise their status and Antuanne and Antonio Russell are hoping to follow their brother Gary on the path to a world title. I want to thank my partner Fire Fist Boxing Promotions, for their hard work to make this event happen in Florida."

The 30-year-old Alexander (26-4, 14 KOs) will end a two-year layoff due to health issues when he steps in against Castillo. Alexander, of St. Louis, Missouri, won the 147-pound world championship with a unanimous decision victory over Randall Bailey in 2012. He lost the title via unanimous decision against Shawn Porter the next year. Alexander, a southpaw, was a unified champion at 140-pounds and owns victories over Marcos Maidana, Lucas Matthysse and Jesus Soto Karass.