KSI wants revenge on Floyd Mayweather for how the boxer treated his younger brother Deji.
In November 2022, Mayweather will face YouTuber Deji in a shock exhibition bout in Dubai.
But the American veteran was accused of forcing Deji to box with smaller 10-ounce gloves on the night of the bout instead of the larger 14-ounce gloves.
It was also claimed that Mayweather refused to go easy on his inexperienced opponent, despite a verbal agreement.
Older brother KSI is still angry at the Hall of Fame great and wants to settle it in the ring.
“There’s something personal with Daisy, JJ is angry with Mayweather. It’s a private matter,” his trainer Alexis Demetriades told SunSport.
“They made the gloves 14 to 10 that night, they paid him for the threat, they paid him to do it.
“And one of Mayweather’s men came up to Daisy and said, ‘If it gets a little hot and you’re in the clinch, tell Floyd to calm down a little bit because this is an exhibition match and he’ll stay with you.
“At one point, Daisy said, ‘Hey, it’s getting too hot.’ And Mayweather said, ‘Fuck you. I’m Floyd Mayweather,’ and tried to hit her.”
“He’s JJ’s little brother. So there’s animosity there, there’s a hunger for a fight for JJ, he thinks he’s an up***k.”
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Mayweather, 47, officially retired in 2017 after defeating former UFC champion Conor McGregor, 35.
But he has continued to box in exhibitions against stars from the social media, MMA and boxing worlds.
They also include YouTuber Logan Paul, 29, and KSI’s brother Deji, 27.
But coach Demetriades insists KSI, 31, has no interest in a showdown against Mayweather but instead wants revenge.
Demetriades said: “He’s going to try to kill him. There’s hostility there. It’s in the look. Like JJ wants to kill him. He wants that fight.”
“It’s crazy, it’s crazy to say that, isn’t it? You have a YouTuber who wants to fight Floyd Mayweather.”
Mayweather will face John Gotti III, the grandson of the notorious Mafia boss, on August 24 in Mexico.
He’s going to try to kill him. There’s hostility there. It’s in the look. Like JJ wants to kill him. That’s the fight he wants.
KSI’s coach Alexis Demetriades
Gotti III was disqualified in June last year, leading to a brawl in the ring, leading to demands for a rematch.
KSI will return to the ring on August 31 in a 2v1 handicap bout against 35-year-old Anthony Taylor and 29-year-old Slim Albahr.
But Demetriades insists Mayweather is still in his sights and KSI is confident of winning the fight.
He added: “Of course it depends on how you win. It’s important to understand what winning means, winning doesn’t always mean a knockout.”
“That’s solid, isn’t it? Logan has fought Floyd, Deji has fought Floyd. JJ has been in the ring with both of those guys, that’s solid.
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“It’s not like MMA math or boxing math that if this guy beats that guy then I can beat him too.
“But there is a solid point, you know a little bit about what you’re dealing with.”