Former UFC two-weight champion Jon Jones says he has accepted an offer to fight his long-time rival Daniel Cormier in a charity grappling match, signalling what could be a unique third encounter between the two.

Jones, who faced Cormier twice in the Octagon during their storied rivalry, confirmed the new development in a recent social media post, but remained vague on the details. Nonetheless, the announcement has stirred interest given the pair’s history and the rarity of a trilogy being settled beyond their original sport.

“I was approached the other day about grappling DC for charity,” Jones said during a fan exchange on social media, as noted by Bloody Elbow. “I said absolutely. Let’s see what comes of it. 3-0.”

The grappling match, should it happen, would represent the latest chapter in a long-running saga between the two rivals.  Their rivalry dates back nearly a decade, with Jones earning a decision win at UFC 182 and a knockout at UFC 214 (later overturned) to claim victories over Cormier in the UFC light-heavyweight division. The possibility of a trilogy in a different sport adds an unusual twist to one of MMA’s most-watched feuds.

Jones would later follow Cormier in winning a UFC title in the heavyweight division, defeating Ciryl Gane for the championship which had been vacated by Francis Ngannou. He later defended it once, against Stipe Miocic, before announcing his retirement from mixed martial arts amid struggles in arranging a contest with the then-interim champ Tom Aspinall. Englishman Aspinall was later upgraded to undisputed champion following Jones’ retirement.