Photos: Amilcar Vidal, Immanuwel Aleem - All Set For Collision

Charlo vs. Castano will see unified WBC, WBA and IBF World Champion Jermell Charlo and WBO World Champion Brian Castano battle for undisputed status at super welterweight as all four 154-pound belts hang in the balance for the first time in history on Saturday, July 17 live on SHOWTIME from AT&T Center in San Antonio in a Premier Boxing Champions event. (photos by Amanda Westcott)

SHOWTIME CHAMPIONSHIP BOXING begins at 9 p.m. ET/6 p.m. PT and will also feature unbeaten Interim WBA Lightweight Champion Rolando “Rolly” Romero taking on lightweight contender Anthony Yigit in the co-main event, plus unbeaten middleweight Amilcar Vidal matching up against veteran contender Immanuwel Aleem in a 10-round bout that opens the telecast.

Undisputed IBF, WBA, WBC & WBO Super Welterweight World Championship Unification – 12 Rounds

Jermell Charlo – 153 lbs.

Brian Castaño – 153 ¼ lbs.

Referee: Hector Afu; Judges: Tim Cheatham (Nev.), Nelson Vazquez (P.R.), Steve Weisfeld (N.J.)

WBA Lightweight Interim Title – 12 Rounds

Rolando Romero – 135 lbs. 

Anthony Yigit – 140 ¼ lbs.

Referee: Rafael Ramos; Judges: Lisa Giampa (Nev.), Wilfredo Esperon (Texas), Robin Taylor (N.Y.)

*Yigit weighed in over the 135 lb. limit. Romero cannot lose his title.

Middleweight Bout (162 lbs.) – 10 Rounds

Amilcar Vidal – 161 ½ lbs. 

Immanuwel Aleem – 162 lbs.

Referee: Ellis Johnson; Judges: Ruben Carrion (Texas), Glen Crocker (Texas), Anthony De Los Santos (Texas)