Watch Brandon Rios, Manny Pacquiao Trainers Get Violent Ahead Of Saturday Boxing Match [VIDEO]

Tensions are high ahead of the much anticipated boxing match between Brandon Ríos and Manny Pacquiao. The two pugilists are already at The Venetian Hotel in Macao, China, site of Saturday night's clash, and are sharing the gym area beneath the Venetian Theatre to keep their bodies in shape during fight week. However, it seems that the fight might have started sooner for their trainers, who got into an altercation on Wednesday over gym schedules. Rios is scheduled to work out in the area between 9 and 11 a.m. each day, with Pacquiao's workout slated for 11 a.m. to 4 p.m.

So when Pacquiao's trainer, Freddie Roach, approached Ríos' trainer Robert García after their time was over, the atmosphere grew increasingly heated as the two camps began to insult each other. A video of the incident shows Roach asking García to leave and apparently calling him names. Garcia replied, backed up by Alex Ariza, Rios' strength and conditioning coach, who previously worked for Roach and Pacquiao. Ariza shouted at Roach to leave, and Roach shouted back at Ariza to "make me." After some verbal back-and-forth, Roach stepped forward. Ariza kicked Roach in the stomach, and more name calling and racial insults were fired, prompting the involvement of security.

"He got physical," Ariza said. "He was going to hit Robert [Garcia]. I told him, 'This isn't Wild Card [gym].' You're not in charge here. He looked at me, cocked his fist back and I kicked him in the chest. ... When you raise your fist at somebody, the other person has the right to defend themselves." Roach was reportedly upset that Ríos's training time in the gym had gone past the 11 a.m. cut-off and run into Pacquiao's session. García wanted some more time because Rios's training had started late due to interview commitments.

"So we say, OK, we're going to go 15, 20 minutes over time [at the gym]," García told reporters afterward. "[Roach] could have waited. His fighter wasn't even here. He could have been wrapping his hands. I don't care. He just wanted to start a fight. He's in trouble. He's nervous." Roach defended himself to ESPN's Bernardo Osuna. "Our time is at 11 each day. I waited until five past 11 upstairs, and I came down, and Brandon was jumping rope. I waited until he had finished, and I went up to Robert García and said, 'Our time is at 11.' Ariza started making fun of my Parkinson's, and I said, 'What's your problem?' and he kicked me and ran away."

"[Ariza] kicked me in the chest and ran away," Roach added. "Then, one of the bodyguards [Leary], I don't know his name, but he's a strong Mexican kid, he started yelling and screaming to get out of the [expletive] gym. I said, 'What, are you the Mexican tough guy?' He came after me and that got broken up. Then, Elie Seckbach started filming and I said, 'Why is this happening,' I said, 'Are you the Jewish reporter,' and he said, 'What, are you a racist?' And I said, 'No. I just don't know your name.' "

Ríos was in the gym but didn't get involved in the altercation. Neither he nor Pacquiao have talked about the incident. Both boxers spent time with each other earlier this year as they embarked on a promotional tour for Sunday's fight, including trips to Beijing and Shanghai as the sport tries to gain popularity in the potentially critical Chinese market. The days in the buildup to big fights are more testosterone-fueled, and this is a particularly big fight - "the biggest fight ever in Asia," according to the promoters, Top Rank. Even David Beckham will be there to watch, Top Rank Chairman Bob Arum said Tuesday.