There were fireworks at the weigh-in for Conor McGregor's upcoming UFC welterweight fight against American Nate Diaz on Saturday.
The near-brawl came after both fighters traded insults on stage.
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Thanks to the roaring mouth of McGregor, there was nearly a brawl Thursday at the final news conference before the event, as well.
McGregor launched another verbal assault on his opponent, Nate Diaz, fueling tension for a stare-down that closed with McGregor swiping Diaz's hand away from him as security men rushed to calm matters.
Ireland's McGregor, who holds the Ultimate Fighting Championship's featherweight belt, will move up 25 pounds to fight late substitute Diaz in a nontitle welterweight main event at MGM Grand.
It's a substantial test, and McGregor (19-2) wanted Stockton's Diaz (19-10) completely aware of who was carrying the show.
McGregor generated a $10.1-million live gate at his last fight in December, and is now positioned to contend in three weight classes after lightweight champion Rafael Dos Anjos withdrew last week because of a foot injury.
"I really enjoy Vegas, I've buried three bodies clean here and Saturday night will be a fourth body," McGregor said. "The dirt is soft. You can stuff bodies cleanly. (Diaz is) very, very predictable, he has a soft, flabby body."
McGregor, who took the featherweight belt by ending the 10-year unbeaten run of Brazil's Jose Aldo with a 13-second knockout in December, added he's comfortable not having to cut weight.
McGregor is so angered by Dos Anjos' withdrawal, he's said that if he performs impressively Saturday he'll pursue a welterweight title shot at Robbie Lawler in July, leaving Dos Anjos with a lesser purse fighting someone else.
"I'm open to whatever he's considering doing," UFC President Dana White said. "If he wants to fight Robbie Lawler, Conor is tough to deny these days. Conor does step up and fight anyone, anywhere, any time, and this is what makes you love the fight business."
In the co-main event, women's bantamweight champion Holly Holm will make her first title defense against repeat contender Miesha Tate. Holm weighed 1341/2 pounds to Tate's 135 - right on the limit.
Holm (10-0) is defending the belt she took in November in a huge upset by ending Ronda Rousey's unbeaten reign with a second-round knockout by head kick in Australia.
Second-ranked contender Tate (17-5), with four consecutive victories since her late-2013 loss to Rousey, presents an experienced, well-rounded foe for Holm, a former boxing world champion.