• Floyd Mayweather berates Conor McGregor after his loss at UFC 257
  • Mayweather gives McGregor a new nickname
  • Mayweather admits trash-talking but points out he can back it up

The combat sports world remains in shock following McGregor’s surprising knockout loss to Dustin Poirier at UFC 257.

Most expected “The Notorious” to come out victorious, but “The Diamond” was too good of a fighter to overlook.

It was something most branded as an upset although Poirier is someone who has proven his stock. Now, McGregor is hearing it from critics, the most notable of which is Floyd Mayweather Jr.

The undefeated American boxer took a solid swipe at the UFC fighter, telling everyone that McGregor dreams of fighting Manny Pacquiao but cannot even win a fight inside the Octagon.

Mayweather is one of many who feels that a big fight with the Filipino boxing icon is likely good as dead.

“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," Mayweather said via his Instagram account.

Mayweather also pointed out how McGregor tried but failed to be like him. He stressed that he is a natural-born winner despite his brashness on the microphone.

“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 why they hate me. 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 come from my own people,” Mayweather stated.

Knocked out: Conor McGregor
Knocked out: Conor McGregor GETTY IMAGES NORTH AMERICA / Harry How

Harsh as it may sound, Mayweather does have a good point. And as far as a Pacquiao vs. McGregor fight, that showdown may have likely been put on hold.

Even if McGregor and Pacquiao are under the same management, the Irishman’s recent loss casts a dark cloud on acceptance for that fight. The plausible way to go is to redeem himself first and show everyone that the hiccup is something he can get through.

Until that happens, the chances of seeing that Pacquiao vs. McGregor clash is now low to none.