VIDEO: Watch Claressa Shields vs. Christina Hammer Live Stream of the weigh-ins at 12:30 p.m. ET

 Atlantic City: FightBook MMA to live stream Claressa Shields vs. Christina Hammer official weigh-ins ahead of their blockbuster unification bout.

Undefeated champions Claressa Shields and Christina Hammer will fight for the undisputed women’s middleweight world championship taking place this Saturday, April 13 live on SHOWTIME from Boardwalk Hall in Atlantic City.

Today’s weigh-in will take place at the Ocean Resort Casino in Atlantic City beginning at 2:30 p.m. ET/11:30 a.m. PT.

The main event of SHOWTIME BOXING: SPECIAL EDITION features two of the consensus top-10 pound-for-pound fighters in the world squaring off to crown only the second undisputed champion in female boxing history. The 24-year-old Shields (8-0, 2 KOs) is a two-division champion who holds the IBF, WBA and WBC 160-pound titles. The 28-year-old Hammer (24-0, 11 KOs) owns the WBO belt, is the WBC Champion in Recess, and has dominated the women’s middleweight division for more than eight years.

Top American heavyweight prospect Jermaine Franklin will take on former No. 1-ranked U.S. amateur Rydell Booker in the 10-round co-featured bout while undefeated Swedish heavyweight Otto Wallin will battle highly decorated amateur Nick Kisner in a 10-round clash that will open the tripleheader.