At 38, Mayweather feels he has nothing left to prove after beating Andre Berto in Las Vegas last September to match legendary heavyweight Rocky Marciano’s 49-0 unbeaten record.

In an interview with BBC World Service Sport, Mayweather revealed he could pick up a “nine-figure sum” by boxing again, but the former pound-for-pound king has ruled out a comeback — for the time being at least.

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He said: “As of right now, I am out completely.

“If I do get the itch to come back, it really won’t be for the money, but I have to get paid. That’s why the nickname is Floyd ‘Money’ Mayweather.”

Mayweather also dismissed claims that talks had been held over a potential rematch with Manny Pacquiao.

The pair fought in the most lucrative bout in history last May, with Mayweather outboxing his opponent to claim a unanimous decision.

“Everything that you guys are hearing that Michael Koncz [Pacquiao’s business advisor] has said and what [promoter] Bob Arum has said is totally false. Totally false. I haven’t spoken to Bob Arum, I haven’t spoken to Michael Koncz,” he added.

“And as far as people keep talking about Mayweather Promotions, I dictate and control what goes on with it. Leonard Ellerbe is the CEO but everything has to go through me and I have to put the green light on any and everything.”

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Mayweather believes he should go down as the best fighter of all time given his achievements in the sport.

“I really wouldn’t want to say the best pound-for-pound fighter in the world — you know, I am no longer active. I would like to say the best ever,” he said. “It’s not being cocky or arrogant, it’s just the proof is in the pudding. I think I have earned the right to call myself TBE [the best ever]. And I have lived up to the name TBE by going out there, day in, day out, when I was active and winning.

“Have I have ever took a loss before? Yes. In life, you lose a loved one, that’s taking a loss. When your children hurt, that’s a loss. When you are sick, that’s a loss.

“But I got to where I got to from a lot of hard work, a very strong team, a smart team that stood behind me.”

To watch the BBC’s interview with Mayweather, click here.