Thousands of fans including a sizeable contingent of Irish supporters thronged the heart of the Nevada boxing capital to greet Mayweather and McGregor at their separate formal grand arrival ceremonies.
Mayweather, the 40-year-old undefeated former welterweight boxing champion, has been lured out of retirement to face McGregor, a star of mixed martial arts' Ultimate Fighting Championship.
The two men meet in a 12-round contest under boxing rules on Saturday that is tipped to become the richest fight in history.
Mayweather and McGregor who clashed repeatedly during an expletive-laden world press tour to drum up interest for the fight last month, insist however that they are ready to deliver a battle for the ages.
McGregor, a massive underdog in what will be his first professional boxing fight, insisted Tuesday he was ready to stun the oddsmakers.
"This is not even close to my toughest challenge ever. I will crumble him," McGregor said.
"I have adapted perfectly to boxing, I am very pleased and ready. I'm a special man, I will prove that August 26, this will go one or two rounds, maybe I will bang him out and hurt him.
McGregor and Mayweather passed each other after their separate introductions, with McGregor taunting the American with a shout of "Why didn't you want to face off?" -- triggering a melee between their two entourages.
- 'Intriguing fight' -
======================
A relaxed-looking Mayweather meanwhile had earlier encouraged fans to bet on the fight finishing inside 12 rounds.
"If you're going to bet, bet it won't go (the distance)."
Mayweather did his best to play down his status as a heavy favourite, insisting that his two-year layoff from the ring had blunted his prowess.
"That's what makes this fight so intriguing, I've been out a few years, feel like I've lost a few steps," Mayweather said.
"So we'll just have to wait and see."
Earlier Tuesday, Mayweather had taunted McGregor over his fitness, telling the US website FightHype that he believed his opponent would struggle to make the 154-pound limit for Saturday's bout.
McGregor could face a painful financial penalty if he is unable to tip the scales inside the limit. Boxers often have the option of cancelling a fight or collecting a larger share of the purse if an opponent fails to make weight.
Mayweather, who is expected to earn at least $100 million from Saturday's contest, indicated he would take the money.
"I get that extra money if you can't make the weight," Mayweather said. "Get those extra millions ready. UFC get those extra millions ready."
Mayweather has fought at 154 pounds before but is more used to fighting at welterweight (150 pounds). McGregor however has fought at 170 pounds in MMA.
McGregor, 29, last week insisted he was in peak condition following a gruelling training camp that had taken him to "hell and back" and left him primed to face either a long or short fight.
"There is no way in hell that I'm not ready to fight in the deepest of trenches in this contest," McGregor said.
Disclaimer: No Business Standard Journalist was involved in creation of this content
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