Claressa Shields and Savannah Marshall could meet in a rematch after their undisputed showdown later this year.
The pair will fight for all the marbles in the female middleweight ranks on September 10 at the O2 Arena.
Shields will put her WBC, IBF, WBA and Ring magazine titles on the line, while Marshall brings her WBO strap to the table.
The event is exclusively live on Sky Sports, as part of a non-pay-per-view broadcast which also features the unification showdown between Mikaela Mayer and Alycia Baumgardner in the super-featherweight division, with those two defending their respective WBO & WBC and IBO titles.
BOXXER promoter Ben Shalom admitted a multi-fight deal was on the cards prior to the match-up’s official announcement.
And Shields (12-0, 2 KOs) has now gone a step further to tell the Daily Mail’s sports section that there is the option for a return clash, with both fighters being given the opportunity to activate the clause, should they so wish, after the first showdown in London.
“There’s a rematch in the contract, it’s there.”
“We can both activate it after the fight.”
“I’m not worried about it; we had a rematch clause when I fought against Christina Hammer. She never activated it. It is what it is.”
Shields is the only boxer in history, female or male, to hold all four major world titles in boxing — WBA, WBC, IBF and WBO —simultaneously, in two weight classes.
Shields, whose last outing was a 10-round IBF, WBC and WBO title defence against Ema Kozin in Cardiff, Wales, back in February, went on to say:
“It’s going to be her [Marshall] losing.”
“because I’m not going to lose. You can note that, and everybody can ask if or when or how. I’m going to win by any means necessary. Period.”
Marshall (12-0, 10 KOs) is the only fighter to have ever beaten Shields in boxing when the pair met as amateurs, and their long-standing rivalry has stemmed from there.
Her last outing took place just a few weeks after Shields’ aforementioned bludgeoning points win over Kozin as she dispatched of Femke Hermans with a left hook to the head in the third of 10 scheduled rounds at the Utilita Arena in Newcastle in April.