Conor McGregor promises to knock Floyd Mayweather out inside four rounds on professional boxing debut

UFC superstar McGregor was in a characteristically confident mood when the two men came face to face for the very first time on Tuesday night

McGregor is confident he can become the first man to defeat Mayweather (Getty )

Conor McGregor is the rank outsider to win his Las Vegas super-fight against Floyd Mayweather on August 26 – and yet the Irishman was in a characteristically confident mood when the two men came face to face for the very first time on Tuesday night.

The Irish MMA superstar has promised to knock out Mayweather inside four rounds when the two men meet at the T-Mobile Arena, an outcome which would see him become the first man ever to defeat the American.

“He is f*****, there is no other way around it,” McGregor said on stage in Los Angeles, on the first evening of the fight’s whistle-stop promotional tour. “His little leg, his little core, his little head, I’m gonna knock him out inside four rounds, mark my words.

“No-one can do anything to me up here, I can do what the I f*** I want up here. As far as the fight, he'll be unconscious inside four rounds. The movement, the power, the ferociousness, he has not experienced this. He’s fought people who have shied away from him, I don't fear him.”

Mayweather replied: “We know Mr Tap Out like to quit and you will wave that white flag. You can choose which way you want to go. You're going out on your face or your back, which way you want to go?”

McGregor, who became the first man in the history of the UFC to hold titles in two different weight divisions when he knocked out Eddie Alvarez at UFC 205, has a long history of making predictions ahead of his fights.

And his unerring ability to correctly predict how his fights are going to pan out has even earned him the nickname ‘Mystic Mac’.

McGregor correctly predicted that he would knock out Diego Brandao and Dustin Poirier early into his UFC career, and also claimed he would knock out Jose Aldo in the first round. It took him just 13 seconds.