After winning her ESPY Best Fighter of the Year award, UFC champion Ronda Rousey took a jab at Floyd Mayweather Jr. for not getting the recognition.

During the event's red carpet, Rousey held the trophy and mocked the undefeated American boxer.

"I wonder how Floyd feels being beat by a woman for once. I'd like to see you pretend to not know who I am now," she said as quoted by E!Online.

Emcee Joel McHale then commented that she has knocked out more women than Bill Cosby.

It can be remembered that Mayweather was previously asked about fighting Rousey but he responded that he did not know who she was, even initially thinking she was a man.

E!Online said he immediately apologised for his mistake.

"I wish her congratulations," he said. "I didn't know who she was the other day. I apologize because I didn't know. I'm used to watching football and basketball. I'm not really into boxing like that."

ESPN reported that Rousey got the award even after Mayweather's victory against Filipino boxer Manny Pacquiao last May.

The female UFC champion is known for knocking down her opponents very fast inside the Octagon, the last being her 14-second victory against Cat Zingano at UFC 184 last February.

With her 11-0 record, she is now set to go against Brazilian fighter Bethe Correia on August 1 in Rio de Janeiro.

According to Yahoo Sports, Rousey is not used to losing but she was beaten by Mayweather for the Best Fighter award last year.

This year, she has finally made her revenge.

Other winners at the ESPY are Golden State Warriors' Stephen Curry for Best NBA Player and Victor Espinoza for Best Jockey ESPY.

The ESPN report added that the voting for the 23rd annual ESPY was done online and was also based on the awardees' performance for the past year.

Despite taking a jab at Mayweather, Rousey enjoyed the presence of another boxing icon, Mike Tyson, who watched her workout on Wednesday.

"Ronda, she's a lady. Polite, kind, sweet and adorable. But her whole barometer [as a fighter] is she's a killer. ... I think of myself when I watch her," Tyson told the Los Angeles Times.

As Rousey knocked down a male sparring partner to the canvas, Tyson could not help but say that it did not look fun anymore.

"It's fun to me," the female UFC champ replied.

The two reportedly chatted after Rousey's one-hour workout, with the legendary boxer giving comments on the boxing session of the female fighter.

"She's doing awesome. She's a beginner, a neophyte, but she excels," added Tyson in the Los Angeles Times report.