Floyd Mayweather Jr does not think anyone wants to see Conor McGregor return to boxing to face Manny Pacquiao following the Irishman's defeat to Dustin Poirier at UFC 257 on Sunday.

Poirier became the first man to knockout McGregor in mixed martial arts with a string of punches to the head during the second round of their lightweight bout.

It was the former UFC featherweight and lightweight champion's first fight in a year and his second since being submitted by Khabib Nurmagomedov in October 2018.

His bout with Nurmagomedov came after he switched to boxing to take on former five-division champion Mayweather, who came out of retirement and put his 49-0 record on the line.

"MAYWEATHER IS ENVIOUS" SAYS MANNY PACQUIAO

Mayweather triumphed over McGregor by TKO in round 10, but the Irishman has been linked with a return to the ring to face Pacquiao – an eight-division champion and the WBA welterweight title holder.

However, it has been reported Pacquiao is closing in on an agreement with Ryan Garcia and McGregor's loss to Poirier will have done his chances of facing the Filipino no good.

Mayweather likened the prospect of Pacquiao, who he defeated by unanimous decision in their long-awaited welterweight bout in 2015, taking on McGregor as "my leftovers eating leftovers".

Sharing an image of a post asking why Mayweather is hated for the way he carries himself, but McGregor is loved for acting in the same manner, he wrote: "I seen this post and my take on it is that the world knows Con Artist McLoser can steal everything from me and be loved but I'm hated. That just lets you all know that racism still exist.

"Just know, that bum will never be me or be on my level. I'm just built different, my mindset is on another planet, my skills are second to none, I'm a natural born winner and yes I talk a lot of trash, but every time I back it up! This is what they hate.

"It's sad that you can be a poor black kid from the ghetto that has dealt with racism your whole life and work extremely hard to put yourself and your family in a better position, and most of the hate comes from my own people.

"Conor cannot even win in his own sport, but talking about coming back to boxing to fight Pacquiao. Nobody wants to see that, it's like my leftovers eating leftovers."

Prior to his fight with Poirier, McGregor said he was committed to a prolonged stint in the UFC's lightweight division.

Despite his loss, the 32-year-old said he feels there are still plenty of match-ups in the Octagon that interest him.