UFC President Dana White has lashed out at Golden Boy Promotions CEO Oscar De La Hoya and Top Rank's CEO Bob Arum.
Both veteran promoters have been very critical of Saturday's showdown between Floyd Mayweather and UFC superstar Conor McGregor, which takes place at the T-Mobile Arena in Las Vegas.
McGregor, a two division UFC champion, will be making his professional debut in a boxing ring - against a fighter who is regarded as one of the best pure boxers in the history of the sport.
Arum and De La Hoya don't agree on much - but they both agree that Mayweather vs. McGregor is a severe mismatch that boxing fans should stay away from.
The Showtime pay-per-view has a heavy price tag, topping out at $100 for HD.
De La Hoya erupted on Friday, when he took to Twitter and wrote "F*** you Mayweather-McGregor" and blasted both fighters for disrespecting boxing. He eventually removed the tweet, but not before it was retweeted and shared a few thousand times.
White is no stranger to feuding with Arum, but got along with De La Hoya in the past.
He is shocked at De La Hoya's position on the fight - because De La Hoya expressed some interest in the past in matching his company star, Canelo Alvarez, against McGregor.
"He's way down with that [Canelo vs. McGregor fight]. Don't believe his bullsh*t. That guy is so full of sh*t that it's not even funny. First of all, when this whole thing first went down [with McGregor looking to box] - Oscar De La Hoya was saying 'oh I would love to have McGregor fight for me and do him and Canelo.' And as soon as the deal gets made [for Mayweather-McGregor] it's the worst fight ever made," White told TMZ.
"Oscar De La Hoya is full of sh*t up to here. I still can't believe he did that [tweet]. Bob Arum is the biggest jerkoff in this sport by a hundred thousand miles. By far the biggest jerkoff in the sport. Now [De La Hoya] left Arum. Everyone will agree that Arum is just an *sshole. Now De La Hoya, who I've known for a long time and I like Oscar, as soon as this fight is made he turns into 'Oscar De La Arum' and goes crazy on the fight."