As previously reported on BoxingScene.com, former five division world champion Floyd Mayweather gave a strong hint that he could be tempted back into the ring, but insisted only a "nine-figure" payday could lure him out of retirement.

The 39-year-old, who walked away from boxing with a perfect 49-0 record after out-pointing Andre Berto eight months ago, was ringside as a promoter of Badou Jack's WBC super-middleweight world title fight with Lucian Bute in Washington DC.

Mayweather told Showtime that while he was happy in retirement, he had not entirely closed the door on a return.

When asked if it would be for the money or the opportunity to take his record to 50-0, he replied: "Both. Yes, I'm happy to be where I'm at.

"Everyone is asking, asking me, 'Is Floyd Mayweather coming back? Right now, I'm happy on this side, but I've been talking and you just never know. But for now, I'm happy on this side. If I came back, of course, it would have to be a nine-figure payday and probably a championship fight," he added.

Since Mayweather's departure from the sport, the pundits have debated on the subject of which fighter should be considered the 'pound-for-pound' best in the world. Some observers list WBC flyweight champion Roman 'Chocolatito' Gonzalez, while others list middleweight king Gennady Golovkin, Olympic gold medal winner Andre Ward or even unified light heavyweight champion Sergey Kovalev. In the opinion of Mayweather, the fighter who took over the pound-for-pound throne is Gonzalez.  

"Roman Gonzalez [is the best pound-for-pound fighter in the world]. Chocolatito, Roman Gonzalez. He's unbelievable, a good puncher, a good boxer, a very good fighter," Mayweather said.