Their immediate rematch comes following failed talks between Cameron and Claressa Shields, after the former's unanimous decision win saw her become the unified junior middleweight champion on August 29.

Cameron (23-1, 8 KOs) added the WBA and WBC crowns to her WBO title while claiming The Ring belt at 154 pounds, before later saying that victory in Birmingham topped inflicting Katie Taylor's career-first defeat.

"I am genuinely excited to box in one of my favourite places," Cameron said in a press release.

"I cannot thank Jake, Nakisa [Bidarian] and Mike [Leonardi] for this opportunity to box on a huge show. They promised to keep me active in 2026 and my third fight in nine months proves just that. We agreed to the rematch before the first fight, so we both kept our word, and now the rematch is on the biggest stage in boxing."

Mayer (22-3, 5 KOs) felt hard done by with another losing decision on away soil and insinuated Cameron would not have prevailed had the fight not been in her "little back yard" at Birmingham's bp pulse LIVE. Her previous two decision defeats, by Alycia Baumgardner (Oct. 2022) and Natasha Jonas (Jan. 2024), also came on British shores.

"Mayer vs. Cameron was a great fight that I truly hope everyone enjoyed," Mayer said in the same release.

"Although I don't feel I performed to my highest potential, I've been working hard to fix the mistakes I made and I will 100% come back stronger! I'm taking my belts back on Thursday, Dec. 24th."

Elsewhere on the card, The Ring and unified IBF/WBO middleweight champion Tamm Thibeault will make her first title defense after outclassing Desley Robinson in August. An opponent will be confirmed at a later date.

"It's been an incredible second half of the year for me, and having become unified champion, I'm hungrier than ever to keep improving, building momentum and showing people what I'm capable of," Thibeault said.