Boxing legend Mayweather was promoting his protégé, Gervonta Davis’ IBF super-featherweight title fight with Liam Walsh at the Copper Box, London, on Saturday night.
Unbeaten Davis is favourite to beat Walsh but the press conference was overshadowed by the insult flinging.
Walsh’s brothers Ryan and Michael heckled Mayweather over his record of never fighting outside of the USA – which Ryan taunted that it tainted his place in boxing’s greats.
Mayweather: (To camera) “I’m just going over there and get things started. Watch me go in and get things started.
Mayweather: “Who fighting on the undercard? I know you two pussies are fighting on the undercard.
Michael Walsh: “Go on Gervonta, you get further up his a***
Mayweather: “You’re the two p****** fighting on the undercard. You’re a p****, you’re a p****, both of you are p******. I beat 23 world champions.
Michael Walsh: “And what? Do we look like we give a a f***? Do I look like I give a f***? Gervonta, get that tongue out of his a***, you’re a mole, get a real family.
Ryan Walsh: “Just answer this one question, why didn’t you travel?
Mayweather: “Shut the f*** up. I’ll slap both of you bitches. Get your bum a**es out of here, this isn’t your press conference. Get the f*** out of here. You aren’t supposed to be here anyway. Get the f*** out of here. I better not catch you all in the US. I’m 40 years old and I’ll kick all three of your a****
Michael Walsh: “Shut the f*** up. We aren’t bothered about you because our brother’s kicking your man’s arse.”
Mayweather: (To camera) “I got those two boys smokin’.”
Source: Mirror UK