FLOYD Mayweather has gone on record to say he will fight Amir Khan if the Bolton ace beats Adrien Broner in his next bout.

But the American – boxing’s pound-for-pound number one – has also has turned up the heat on former world champion Khan by suggesting he will not have to keep his promise because he expects his fellow countryman Broner to beat him in their proposed fight.

Khan had expected to challenge Mayweather in Las Vegas on May 3, after he won a fans' poll to determine the double world champion’s next opponent.

But when the American opted to fight Marcos Maidana instead, Khan accused him of taking the "easy option".

Mayweather responded on Twitter, saying: "If you and Broner end up fighting each other on my show and you win (which you won’t) I'll fight you."

Khan signed a deal in December that he hoped would lead to a showdown with Mayweather, a 10-time world champion in five weight divisions who currently holds world titles at welterweight and light-middleweight.

Now the 27-year-old former WBA light welterweight champion looks set to fight 24-year-old Broner on the undercard of Mayweather's welterweight unification fight with Argentine Maidana at the MGM Arena.