Photos: Gilberto Ramirez, Alex Saucedo Putting in Work

Signal Hill, Calif. - Gilberto "Zurdo" Ramirez and Alex "El Cholo" Saucedo showcased their skills for the media Tuesday at Hill Street Boxing Gym as they finalize preparations for their respective nationally televised bouts, June 30 at the Chesapeake Energy Arena in Oklahoma City. (Photos by Mikey Williams).

In the main event, Ramirez (37-0, 25 KOs) will defend the WBO super middleweight title against unbeaten Colombian challenger Alexis Angulo (23-0, 20 KOs), while Oklahoma City native Saucedo (27-0, 17 KOs) will face Australian puncher Lenny Zappavigna (37-3, 27 KOs) for the WBO International super lightweight title.

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Ramirez-Angulo and Saucedo-Zappavigna will be televised live on ESPN and ESPN Deportes at 9 p.m. ET. Undercard action, including appearances by 2016 Olympic gold medalist Robson Conceicao, female fighting sensation Mikaela Mayer, and heavyweight knockout artist Trey Lippe Morrison, will be broadcast on ESPN+ beginning at 6 p.m. ET.

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Promoted by Top Rank, tickets to this world championship extravaganza are ON SALE NOW. Priced at $200, $100, $60, $40 and $25, not including facility and service fees, tickets may be purchased at the Chesapeake Energy Arena box office, online at Ticketmaster.com, all Ticketmaster outlets or by phone at 1-800-745-3000.

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