Floyd Mayweather Snr claims his son should take on Amir Khan in his last fight before retiring - because it would give the pound-for-pound king an "easy" victory before hanging up his gloves.
Mayweather Jr secured his status as the greatest fighter of his generation with a unanimous points victory over rival Manny Pacquiao in Las Vegas last Saturday.
The 38-year-old has one fight remaining on his Showtime contract and insisted it will be for prestige, having decided to vacate all five of his world titles in the aftermath of his triumph over Pacquiao. His father, though, is hoping for an easier ride and believes Khan would pose no threat to his son's 48-0 unbeaten record.
"I'll tell you what I think my son 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 fights," Mayweather Snr told the Daily Star.
"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. Khan has a pretty decent jab but all the technical things, he can't do [them]."
Briton Khan, who was ringside for the Fight of the Century at the MGM Grand, is next in action against Chris Algieri on May 29. Domestic rival and IBF champion Kell Brook remains an option for Khan, but the former light-welterweight titlist believes a clash with either Mayweather or Pacquiao is a realistic possibility.
"I think the [Floyd] fight is there," Khan told BBC Radio Five Live's Sportsweek programme. "I spoke to Len Ellerbe, his manager, I saw him in the media room and he came over to say 'Hi...he's ready when you are.'
"I think Mayweather's team want the fight. But then - on the other hand - I've even spoken to Manny's team and they said the same thing. [They said], 'Look Amir, I think it'd be good to have the fight between you and Manny next.
"I'm in a position where I could fight either guy but I think Mayweather's the one I want, because I really believe I have his number.
"Before anything I have Chris Algieri to take care of. But I'm ready for whatever Mayweather wants. It just depends on my schedule this year, but if we could do this year or maybe early next year I will definitely jump to it.
"I think it would be an amazing fight, one that boxing fans all around are talking about because I really believe size is a big factor between me and him and the speed and the power as well."
Mayweather Jr, though, simply wants to enjoy his triumph over Pacquiao and revel in being part of the richest boxing match in history. The American refused to discuss potential opponents for his final outing and is adamant he will not attempt to eclipse Rocky Marciano's 49-0 fabled record.
"It's about working smarter, not harder. We believe in taking as few punches as possible," Mayweather said.
"I don't want to start taking abuse to my body when I'm almost 40. I want to have all my faculties. I invested my money extremely well, so I could retire from boxing today A-OK.
"Every fight played a major role in where I am today, not just one fight will define my career. This fight was extremely important to me. The ultimate goal was to make nine figures and that's what we did."