Claressa Shields and Savannah Marshall square off for the final time, while Mikaela Mayer and Alycia Baumgardner square off once more.

Mikaela Mayer and Alycia Baumgardner separated by security at final face-off ahead of fiery unification bout; watch their co-main event on Saturday's all-female card at The O2, live on Sky Sports from 7.30pm, ahead of Claressa Shields and Savannah Marshall's undisputed middleweight world title.

Claressa Shields and Savannah Marshall avoided further conflict, while Mikaela Mayer and Alycia Baumgardner clashed once more as they faced off for the final time before facing off in Saturday's historic all-female card at The O2.

Both fighters weighed in at 11st 5lbs 5oz ahead of a fight that has been a decade in the making since Marshall's famous amateur win over Shields in 2012, which remains the American's only career defeat.

Shields reiterated her intention to knock Marshall out after her opponent accused her of being unable to 'finish' fighters during Thursday's press conference.

"It's another fight," Shields said. "I've previously visited this location. I'm really looking forward to tomorrow. Everyone is talking about self-promotion. I'll finish the job tomorrow, and then we'll see who is the self-proclaimed tomorrow.

"Boxing, not talking, wins fights. That's why I have 12 world titles and she has one. It's going to be thrilling and explosive. Prepare for it tomorrow.

"I'm going to win at any cost, but Savannah Marshall is going to be dropped tomorrow. I'm going to hurt her tomorrow, and everyone who boasts about their punching power will be disappointed."

Marshall laughed off Shields' prediction that she would knock her down, then engaged in a lengthy - but silent - brawl before returning her full attention to the ring.

"Everything has been said. "I can't wait until tomorrow night," Marshall said.

"I always make the weight easy. I'm feeling good, and five weeks has done me nothing but good, so let's get this party started.

"As usual, Savannah Marshall wins." It's incredible; the response has been overwhelming; I'd like to thank everyone who has purchased a ticket. It truly means everything."

Mayer and Baumgardner clashed again moments earlier, as a heated build-up between the American rivals came to a close ahead of their eagerly anticipated unification co-main event.

The pair each weighed 9st 3lbs 5oz before squaring off in the final fight, during which Baumgardner appeared to push Mayer, who then retaliated by using her foot to shove her opponent as security intervened.

"I didn't have any arms because I had three belts, so I used my leg," Mayer joked afterwards to Sky Sports.

"All of this talk about struggling to gain weight reflects what's going on with this girl. She struggles because she spends too much time in the weight room.

"She knows she has to knock me out; it's the only way she can win. I'm going to outbox her; she thinks she's a good boxer, but she's never fought someone like me."

Baumgardner and Mayer had already been separated twice this week, first during a media recording on Wednesday, when Mayer disagreed with a suggestion she had benefited from better'resources' than her opponent coming through the ranks, and then during Thursday's press conference, when they traded expletives in the face off.

"I belong here," Baumgardner said. "I was born for this moment." I'm ready to unify the division against Mikaela Mayer on Saturday night. She's got a dog in there with her.

"She knows, she feels threatened, and I'm here to take over and dethrone her." I'm here to be the world's unified champion, and she'll see that tomorrow."

Lauren Price (10st 5lbs 5oz) weighed in comfortably as she prepares to face Timea Belik (10st 5lbs) in their welterweight contest.

"It's another dream come true, an all-female card," Price said. "I want to put on a classy performance, and I'm looking forward to it." "I've had amateur Olympic experience, but I think Saturday night will be pretty special."

"I'm more excited for the co and main event because I know Savannah and we go way back, so I'll be rooting for her all the way."

Unbeaten Caroline Dubois weighed in at 9st 11lbs and will look to extend her 3-0 professional record against Milena Koleva (9st 10lbs 5oz) in their lightweight clash.

"I've been working on a lot of things in the gym, changing up the range, becoming more relaxed on the inside, and becoming that all-around fighter, the full package," she explained.

"It's crazy, I've been watching these girls since I was 11 and now I'm fighting in the same card."

Claressa Shields and Savannah Marshall will square off to unify the middleweight titles live on All Sports on Saturday at 7.30 p.m.