Anthony Dirrell and Callum Smith finally have a date for their vacant WBC super middleweight title contest.

Smith’s trainer, Joe Gallagher, tweeted from his verified account Friday that his charge signed a contract for the bout on Sept. 9 in Los Angeles. With a rematch between RING featherweight champion Leo Santa Cruz and Abner Mares ordered by the WBA last month, it’s possible Dirrell-Smith will land on the undercard.

The WBC’s 168-pound title became vacant when Badou Jack abdicated following a draw with James DeGale in January to move up to 175 pounds.

TGB Promotions, who handles many shows on behalf of Premier Boxing Champions’ stable of fighters, won a purse bid for the bout in March with an offering of $1.6 million.

Dirrell (30-1, 24 KOs), the younger brother of Andre Dirrell, lost the title to Jack via split decision in 2015.

Smith (22-0, 17 KOs), too, comes from a boxing family — he’s one one four fighting Smith brothers from England, but many experts believe the 27-year-old is by far the most talented of the bunch.