Watch: Mayweather's son says he's 'officially done'

Floyd Mayweather announced his retirement following Saturday's victory over Conor McGregor, but there are some who believe a rematch could be in the cards.

Not so, says Mayweather's son, Koraun Mayweather, who confirmed to TMZ Sports that the boxer is hanging up his gloves for good.

"No chance. No chance. No rematch," Koraun said. "Officially done. He's 40, gotta realize that. He's an old man."