Conor McGregor

Mayweather stopped McGregor in the 10th round when the UFC superstar made his professional boxing debut in August 2017.

The unbeaten Mayweather retired for the third time after that bout, but announced last November that he would resume his career yet again in 2020 for a "spectacular event".

McGregor will make his UFC comeback against Donald 'Cowboy' Cerrone on Saturday and the 31-year-old Dubliner took the opportunity to call out Mayweather prior to the fight.

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Mayweather extended his boxing record to 50-0 by beating UFC star Conor McGregor last year, and has recently teased a rematch inside the Octagon.

The stateside TV logistics would have caused a problem, according to the UFC's White, but those fears have been allayed.

"Nothing is off the table. The objective is to do events that do good business and, more importantly, provide good entertainment to the fans," Showtime president of sports and event programming

Stephen Espinoza told Sky Sports, despite incurring criticism from White last weekend.

The sport's best-known athlete and an international star, McGregor, 29, appeared before a judge at the Kings County Criminal Court, dressed in a blue, long-sleeved shirt that hid his trademark tattoos.

He is charged with three counts of assault and one count of criminal mischief.

"He's the most visible face on the planet; he has no criminal history and the bail package is completely appropriate in the $50,000 amount," his lawyer Jim Walden told the judge.

Ringside tickets to the Mayweather v McGregor fight went for up to $138,000, but a British bartender managed to upgrade his seat for free.

Oliver Regis bought a ticket to the weekend's super fight between UFC star Conor McGregor and unbeaten boxer Floyd Mayweather in Las Vegas. 

But when he got there, he wasn't happy with his seat and decided to take matters into his own hands.

UFC superstar Conor McGregor racked up a bar tab of NZ$138,000 as he celebrated his boxing loss to Floyd Mayweather.

McGregor suffered a 10th round TKO in an absorbing battle with Mayweather in Las Vegas on Sunday.

But he might have had a bigger headache from the action after the bout.

He turned up to the official press conference with a bottle of Irish whiskey, and that was just the start of a long night.

McGregor, though, surprised many by going toe to toe with Mayweather until the 10th round.

"He's a lot better than I thought he was," Mayweather said after the bout.

Mayweather is the first boxer to reach 50 fights undefeated. After today’s win, he said this was the final fight of his career.

The only certainty of this fight was that it would be a spectacle not seen before.

UFC superstar McGregor will make his boxing debut in Las Vegas after luring Mayweather out of retirement for the blockbuster event.

Given Mayweather's 49-0 record the American has been installed as strong favourite for the fight, but McGregor's odds have continued to come in as the bout draws closer.

And UFC boss White believes McGregor is going to shock the world by knocking out his illustrious opponent, and in turn make him the "greatest combat sports star ever".

"To think Conor can't beat Floyd Mayweather is quite something," White told BBC Sport.

That's the tale of the gambling market in the leadup to Sunday's super fight between UFC star McGregor and unbeaten boxer Mayweather in Las Vegas.

The two go at each other in a boxing contest, taking cocky Irishman McGregor out of his comfort zone.

ESPN Boxing has done the rounds of the Vegas sports betting agencies and come up with some interesting figures for what the punters think will unfold in a fight of such intrigue.

Nevada boxing regulators on Wednesday (Thursday NZ time) gave the two fighters an exemption to a rule requiring 10-ounce gloves for fights at 154 pounds (69.8kg), approving eight-ounce gloves for the August 26 bout. Representatives of both fighters appeared before the Nevada State Athletic Commission to request the waiver.

Commissioners also approved veteran referee Robert Byrd as the third man in the ring for the fight.

The five-weight world champion and UFC star McGregor have both predicted stoppage victories ahead of their eagerly awaited showdown at the T-Mobile Arena in Las Vegas on August 26, live on Sky Sports Box Office.

And Mayweather admits that McGregor can claim a moral victory if he manages to reach the final bell.

"He believes it's not going past four and I believe that it's not going to go the distance at all," said Mayweather at his media workout.

"He feels one way, I feel another way, we are both confident in our skills and we'll just have to see.