Conor McGregor says Floyd Mayweather is “scared” in the build-up to their multi-million dollar fight on 26 August in Las Vegas.
Mayweather, 40, said on Thursday that the bout “won’t go the distance”.
Speaking at a media workout on Friday, McGregor, 29, said: “You know what I heard him say yesterday? Nothing. I saw a man scared… I saw a man trying to talk himself out of it.
“I’m preparing to win, and to win in devastating fashion.”
UFC lightweight champion McGregor, who has never boxed professionally, is due to face Mayweather in a 12-round super welterweight boxing bout that could earn both men about $100m.
Mayweather, who retired in 2015 with an unblemished 49-0 record, has beaten boxers such as Ricky Hatton, Manny Pacquiao and Oscar De La Hoya during his professional career and is aiming to surpass Rocky Marciano’s mark and move to 50-0.
But McGregor said he expects to defeat the American within 12 rounds.
