Brandon Rios's trainer Robert Garcia has accused Freddie Roach of racism after an alleged foul-mouthed rant at a gym.
Garcia claims that 53-year-old Roach, who trains Manny Pacquiao, had launched a tirade against him.
Quizzed about the incident by ES News, Garcia said: "He called me a piece of shit and he called [an unnamed trainer] a fucking Jew, and a fucking Mexican."
"That guy who won Man of the Year in the Philippines, called me a piece of shit. It's actually sad bro, I feel sorry man.
"[Roach] hates Mexicans, but no, Manny is not a racist. I'm not pissed off at Freddie Roach, he's pissed off at me."
Garcia's fighter Rios squares off against Pacquiao this weekend.