Freddie Roach says he is backing Conor McGregor, but believes the irishman can only last four rounds.
The boxing trainer said the mixed martial arts professional is exciting to watch ahead of his fight against Mayweather.
Roach says McGregor is more exciting to watch than his opponent, as they prepare for their Las Vegas fight.
“He’s [McGregor] fun to watch,” Roach told boxing.com.
“He’s a character. [But] he’s not that good of a fighter. He’ll let his hands go and so forth. He’s a little wild.
“He’s putting himself on a very high level. I think he’s more of a four-round fighter at this point.”
“He’s not a risk-taker anymore,” he said of Mayweather.
“He’s not the most exciting guy in the world. But, he’s still a great boxer. [McGregor] can’t beat guys like that, in my opinion.”