Ex-UFC champion Francis Ngannou clashed with Tyson Fury and said he is "just getting started" in boxing before his heavyweight fight with Anthony Joshua.
Ngannou faces Joshua in Saudi Arabia on Saturday but opted to do his best verbal sparring with former opponent Fury at Wednesday's news conference.
Joshua took a back seat as Fury reacted to Ngannou's suggestion he had struggled in their October bout.
Ngannou said with a grin that he had one win over Fury and he wants one more.
Fury shouted back that he would face Ngannou in the "octagon" - the UFC's trademark cage - to which the French Cameroonian replied that his only chance was in a boxing ring, with boxing rules.
Ngannou was the UFC's reigning heavyweight champion when he left the promotion last year.
The 37-year-old made his boxing debut against Fury four months ago and suffered a contentious split-decision loss - but sent shockwaves through the sport by dropping the WBC champion in the third round.
Ngannou and Fury clashed at Saudi powerbroker Turki Alalshikh's house on Tuesday, and the MMA star was in a bullish mood on Wednesday with the Briton in the audience.
He says he is just getting started, and he does not think that beating Joshua will make any statement about his career because the road is still long.
BBC
Stay tuned for the latest news on our radio stations
