Floyd Mayweather Jr's father has urged his son to take on Amir Khan in his 49th fight because the American would 'easily' beat the British boxer.

Mayweather Jr extended his undefeated record when he sealed a unanimous points win over Manny Pacquiao in Las Vegas on Saturday night.

Khan has been open about his desire to fight the pound-for-pound king, and Mayweather's father believes that it would be a "good" matchup for his son.

"I'll tell you what I think he should do in September - given he's fought all the hard-hitters, my son needs to get his contract and end it with an easy fight - he don't need no tough fight," the Daily Star quotes Mayweather Sr as saying.

"Amir Khan, yes that'd be a good fight for him. My son would beat him I know. Of course it would be easier than Pacquiao. Amir Khan has a pretty decent jab but all the technical things, he can't do."

Mayweather Jr is due to retire after his 49th fight.