In the fight of the year, Mayweather and McGregor will lock horns next month.
Many expect the 40-year-old to reign supreme as he aims to make it 50 fights undefeated – and 27 KO’s along the way.
McGregor, the reigning UFC lightweight champion, will be making his boxing debut against arguably the best in the business.
Mayweather’s unblemished record has seen him claim scalps against the likes of Ricky Hatton, Manny Pacquiao and Diego Corrales over the years.
And he was quick to remind McGregor that, despite all he has achieved throughout his UFC career, he still has much to do if he is to become an ‘A list’ star.
“We knew I was the A-side,” he says.
“That’s why it says Mayweather first.
“That’s why this b**** had to come to the boxing ring.”
The US star also ripped McGregor for the three submission losses in his UFC career.
“We know Mr Tapout like to quit and you will,” Mayweather added
“You going out on your face or you going out on your back.
“Which way you want to go? Which way do you wanna go?”
McGregor ignored the jibe which prompted Mayweather to say: “That’s right, be quiet you little b****.”
