WBC Middleweight Champion Jermall Charlo and WBC Super Welterweight Champion Jermell Charlo previewed the CHARLO DOUBLEHEADER at official weigh-in Friday, as they went face to face with the opponents presenting the toughest tests of their careers. (photos by Amanda Westcott)

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Jermall will face top contender Sergiy Derevyanchenko headlining part one of the doubleheader, while Jermell takes on WBA and IBF 154-pound champion Jeison Rosario in the main event of part two of the twin bill taking place this Saturday, September 26 live on SHOWTIME PPV (7 p.m. ET/4 p.m. PT), in an event presented by Premier Boxing Champions.

The three-fight Charlo vs. Derevyanchenko card will see WBA Super Bantamweight Champion Brandon Figueroa defending his title against 122-pound contender Damien Vázquez in the co-main event, plus WBO Bantamweight World Champion John Riel Casimero battling unbeaten Duke Micah in the pay-per-view opener.

Following a 30-minute intermission at the conclusion of Charlo vs. Derevyanchenko, the three-fight Charlo vs. Rosario card will begin. Unbeaten former champion Luis Nery takes on undefeated Aaron Alameda for the vacant WBC Super Bantamweight World Championship in the co-main event, while former unified champion Danny Román duels former champion Juan Carlos Payano in a WBC Super Bantamweight title eliminator kicking off the second portion of the pay-per-view