UFC champion Ronda Rousey bested Floyd Mayweather for the Best Fighter ESPY award and then insulted him by making references to his history of women-beating.
In accepting the award, Rousey said she Mayweather finally got "beat by a woman for once" and wondered how he felt about that.
Mayweather has a history of at least seven assaults against five women that resulted in arrest or citations.
In 2001, he allegedly assaulted the mother of one of his children by striking her face with a car door and punching her several times.
Then he was found guilty on two counts of domestic battery and given a suspended six-month prison sentence for attacking two women at a Las Vegas nightclub in 2003.
One of the women, Herneatha McGill, testified that Mayweather punched her von the cheek, and then went on to punch her friend Kaara Blackburn on the back of the head as she tried to help.
In 2010, assaulted the mother of three of his children that included punching her in the head.
He served two months of a 90-day sentence after making a plea deal to domestic assault and pleading no contest to harassment charges.
Mayweather spent several months in jail in 2012 after pleading guilty to misdemeanor assault charges.
Rousey also chided Mayweather for pretending that he doesn't know who she was.
Just a few days back, it was welterweight champ Keith Thurman who was hurling insults at Mayweather.
Thurman called Mayweather an old man who doesn't want to get beat up by a younger fighter after Mayweather offered Errol Spence as an opponent for Thurman when the latter called out Mayweather.
Mayweather is reportedly eyeing a much easier assignment against Andre Berto for September on what could be the last fight of his career.
Meanwhile, Rousey was also named the Best Female Athlete ESPY, topping tennis icon Serena Williams, skier Lindsey Vonn and Connecticut's Breanna Stewart for the award.
Voting was conducted online and was based on performances in the past 12 months.
In her last fight last February at UFC 184, Rousey (11-0) defeated Cat Zingano via submission in only 14 seconds.
It was her fifth title defense and the quickest finish ever in a UFC title fight.