The fight was scintillating, but ended with cards which read 97-93, 97-93, 96-94, all in favor of Cameron, who added The Ring, WBA and WBC belts to her WBO strap at bp pulse LIVE.

“I'm buzzing, I really turned into a dog," Cameron said in the ring as the pair came to verbal blows once again. “I wanted to play with her, I wanted to show, don't talk a big game if you can't back it up. She said she was gonna beat me so bad we wouldn't have the rematch."

Both women came straight out of the blocks to land leather immediately. Mayer (22-3, 5 KOs), The Ring's No. 3 pound-for-pound female fighter, connected with a stiff jab straight away, but No. 5-ranked Cameron (21-1, 8 KOs) used her deceiving speed to land some big right hands in return.

The fiery opener was rubber-stamped with a shoulder barge, initiated by Cameron, after the bell rang, with the pair coming face-to-face only for referee Mark Bates to intervene and split them up.

The second round was a better one for Mayer, an American who was twice previously beaten on British soil in close, heartbreaking circumstances – first against Alycia Baumgardner in September 2022 and then versus Natasha Jonas in January 2024.

It became clear in the third that Cameron would look to invite Mayer into a brawl, stepping forward constantly and landing with both lefts and rights. Mayer, who doesn't shy away from those kind of fights, looked to stay disciplined on her back foot. Perhaps the most eye-catching shot of the third came from Cameron, a right hand to the side of the head.

Mayer looked to get more active in the fourth, landing a good right before Cameron followed up with a one-two. Mayer came forward yet again, however, throwing huge, thudding shots at home fighter Cameron.

The fifth round was the most absorbing yet, with both women out to prove to the judges they were doing more than the other in an action-packed but tight round to score. Mayer had success with her left hand while Cameron's right connected with Mayer more than any other shot.

Another close round came in the sixth, but Mayer arguably got the better of it, as Cameron sensed and said to her trainer Jamie Moore afterward.

Mayer got back on her jab in the seventh, though Cameron would try and time right hands in between her opponent's shots. Whenever Mayer came forward, Mayer would also attempt moving to her left, landing the left and pivoting away.

The pace dipped in the eighth round but it was still Cameron pressing forward while Mayer countered. Cameron then landed the biggest shot of the fight with a huge right hand which shook Mayer to her boots. With two rounds left it became clear the judges would have their work cut out.

Cameron began to goad Mayer in the ninth, smiling while landing jabs, hoping for Mayer to react with a rash counter. A cut opened up above the left eyes of both women, presumably from a clash of heads. With one round left, it looked to be anyone's fight.

Northampton's Cameron wanted to let the judges know it would be her night and got off to a fast start in the final round. It was Mayer, however, who landed the better of the shots with 30 seconds left. First came a right hand over the top and then another right which knocked Cameron off balance.

It needn't have mattered, however, as Cameron, who was raised high into the sky by cornerman Moore, pulled off the victory to unify the 154-pound division.

"I was playing with you, I was laughing at you, you were so slow," Cameron told Mayer, who was adamant she won the fight.

"I think I outboxed Cameron," Mayer said. "I'll give myself an honest evaluation. But yes, I outboxed her. She knows how to box, but she didn't do anything I didn't expect. A rematch is in our contract, if she wants it again, we'll give it to her."

Cameron obliged, telling Mayer to work on many different attributes before demanding the rematch be with three-minute rounds.