A few days ago, UFC superstar Conor McGregor has wished Floyd Mayweather a happy retirement but thinks his conqueror has "very strong tools he could bring into an MMA game".

Mayweather resumed his illustrious boxing career to do battle with McGregor in a mega-money fight in Las Vegas last weekend.

The five division world champion improved his perfect record to 50-0 by stopping the Irish fighter in the 10th round at the T-Mobile Arena before vowing that would definitely be his last fight.

As McGregor weighs up his options after his first professional boxing bout, the 29-year-old believes Mayweather could take a leaf out of his book and try his hand at mixed martial arts.

McGregor posted on Instagram: "Congrats to Floyd on a well fought match. Very experienced and methodical in his work. I wish him well in retirement. He is a heck of a boxer. His experience, his patience and his endurance won him this fight hands down.

"I always told him he was not a fighter but a boxer. But sharing the ring with him he is certainly a solid fighter. Strong in the clinch. Great understanding of frames and head position. He has some very strong tools he could bring into an MMA game for sure."

UFC legend Chuck Liddell disagrees. He feels the transition from boxing to MMA is much harder than move from MMA to boxing - because just about every UFC fighter has experience with fighting on ground and would simply take a boxer down within the first minute. 

That's what happened back in 2010, when boxing great James Toney jumped over to the UFC and was easily taken down and submitted within a few minutes by MMA icon Randy Couture.

Besides McGregor making his comment about Mayweather, several other boxers - like Andre Berto - have expressed interest in jumping over to the UFC.

"Guys coming from boxing -- stay there - unless you learn how to wrestle real well," Liddell told TMZ Sports.

"Its definitely more feasible [to go from MMA to boxing than boxing to MMA]. People says they don't fight as pretty [in MMA] as they do in boxing - that's because they can't, it won't work. Floyd wouldn't have made it out of 1 round [in the octagon] - not kickboxing, not MMA, not a street fight - not 1 round."