McGregor and Mayweather face off in Las Vegas on August 26 when UFC meets boxing.
The duo will throw down in the boxing ring over 12 rounds at the T-Mobile Arena.
Mayweather is the heavy favourite having gone 49 bouts undefeated with McGregor never stepping into a professional ring.
But the UFC champion believes he has a genuine chance of stunning the world.
Even Mayweather was talking McGregor up this week when he said: “He’s a lot younger.
“When you look at myself and Conor McGregor on paper, he’s taller, has a longer reach, he’s a bigger man from top to bottom. He’s a lot younger, so youth is on his side.
“And I’ve been off a couple of years. And I’m in my 40s. So, if you look at everything on paper, it leans toward Conor McGregor.
“I’m not the same fighter I was two years ago. I’m not the same fighter I was five years ago. I lost a step.
“A fighter like Andre Berto isn’t even supposed to go the distance with Floyd Mayweather, but remember, I was 38.
“It’s obvious I’m slipping a little bit to even let a fighter like that go the distance with me.
“I’m not what I used to be.
“I used to have a 90 percent knockout ratio. Its obvious I slipped somewhere. Something has taken a toll on my career.”
However his new betting partner – Betsafe – are not so sure with new customers able to back him at 49/1.
“Today I’m happy to announce that I’m partnering up with Betsafe,” McGregor said. “It is an honour for me to be an Ambassador for this great brand. Although real gamblers know the odds are stacked against them, we also know that passion overcomes the odds.”
Nicola Fitton, Managing Director at Betsafe, said: “We are delighted to announce our new partnership with Conor McGregor. Conor is one of the biggest athletes in the world today, defined by his extreme talent, work ethic and personality, which are values that we reflect every day at Betsafe.
“We firmly believe that passion always overcomes the odds, and there is no sports star in the world today that both inspires and embodies passion as much as Conor.
“It’s a pleasure to be a part of Team McGregor and we very much look forward to being in his corner over the next 18 months.”
Betsafe also represent Manchester City, Tony Bellew, Jimi Manuwa, Cage Warriors, and Saracens but McGregor will take centre stage for the coming weeks.
Source : EXPRESS