Berto, who went 12 rounds with Mayweather in 2015, says McGregor has the confidence to be able to stand up to Mayweather and win.
It’s the fight game. Something can happen. He catches [Mayweather], no-one gonna be able to tell Conor anything. He’s gonna be king of the world. He’s special as well. I’ve never seen an UFC or MMA fighter — and I’ve been watching for a long time — soak in and soak up that atmosphere and be able to soak in that pressure. And still look so relaxed, and capitalize on that. [He should] Just do what he does. Just stay sharp. Stay confident, within that arena.
— FOX Sports: UFC (@UFCONFOX) June 22, 2017