Both fighters are unbeaten, but Mayweather, who has previously taunted Hatton over his weight, insists Hatton will go away a beaten man.

BBC: SPORT | Boxing | Hatton inspired by Vegas venue

He also taunted Labour over the power of the Unite union over its finances and the link with Ms Harman's husband, Jack Dromey, who is the union's deputy general secretary.

BBC: Prime minister's questions