Conor McGregor will prove everybody wrong against Floyd Mayweather Jr and go down as the "greatest fighter in history", his manager Audie Attar has said.
McGregor and Mayweather recently finished a tempestuous press tour in which the two repeatedly traded insults ahead of their blockbuster Las Vegas bout on August 26.
UFC superstar McGregor is a heavy underdog against Mayweather, who is putting his perfect 49-0 boxing record on the line against the Irishman.
But Attar has complete faith in McGregor, who he expects to go down in legend by handing Mayweather his first professional loss.
"We've just got five weeks until August 26 and the greatest fight in combat sports history ever," Attar told The Independent.
"I tell you, when Conor goes out there and proves everybody wrong, he will no doubt go down as the greatest fighter in history."'
McGregor's coach John Kavanagh recently warned that the Irishman's boxing skills are improving all the time.
McGregor, 28, has never boxed as an amateur or professional and has roundly been written off by experts who say he has no chance against Mayweather, but Kavanagh feels his man is already shaping up well.
"He will be very well-prepared," Kavanagh said. "We have gone through one training cycle and we had in some good sparing partners, and, as we expected, his skills transcended over. He is not trying to win Wimbledon. It's not that different.
"His understanding of range, his understanding of how to move around is excellent. It's not completely different. There are some differences in this fight; he doesn't have to worry about someone shooting (kicking) on him. It's been a great experience. The first half has gone very well and I am heading out to Vegas for the second half on Monday."
Boxing personalities such as Mike Tyson, Freddie Roach and Amir Khan and several others have already declared the contest a mismatch.
