Matchroom Boxing’s December 7 card in Puerto Rico on December 7 saw two of the company’s once-undefeated prospects suffer shocking upset losses little-known contenders.

Marc Castro lost a 10-round split decision to Agustin Quintana in their lightweight battle. Highly touted blue chip prospect Jalil Hackett also dropped a 10-round split decision to Jose Vazquez at welterweight.

Following the fights, Matchroom Boxing head Eddie Hearn was at the center of some criticism online from the boxing community that the promotional company is not doing an adequate job of matchmaking and building its prospects.

Hearn caught wind of the comments and went on a furious rebuttal bashing the naysayers.

“They're like, 'Oh, Eddie Hearn gets his prospects beaten. Fuck off. If you can’t beat those guys, you’re not the fighter that I thought you were, and if you lose tonight it’s not the end of the road for you,” Hearn told IFL.

“You’ve got to rebuild, and you’ve got to come back better. If you don’t want to watch competitive fights, if you don’t want to see prospects tested just a little bit, when they’re 8-to-1 odds – fuck off and don’t watch my shows, because I’m going to give you real fights, and I’m going to give you entertainment. And guess what? Sometimes, when people underperform, or they’re not good enough, they’re going to lose. Not every prospect is going to go on and be a world champion, but if you spoon-feed them and never put them in anything competitive, one, it’s a shit product, two, it’s a con for the fans, and three, you’re not doing the right job for the fighter because when they get to the top they’re not going to be good enough.

"Eddie Hearn found out that tonight they ain’t good enough. ‘That’s a bit harsh.’ Mate, you want me to keep it real for you? Marc Castro, you were not good enough tonight. If you perform like that you are not going to be a world champion or reach that level. Jalil Hackett, if you don’t make weight professionally, you are not going to beat guys like that who you should be strolling through. Facts. Grow a fucking set and stop fucking mincing around the subject and be real with people.

“Sport – you get beat when you’re not good enough. You know what I am saying? You don’t just make matchups that are shit, where you can’t lose. It’s shit. It’s shit for the sport, and it’s shit for the prospect."

The show's headliner saw unbeaten contender Richardson Hitchins (20-0, 8 KOs) dethrone unbeaten IBF 140-pound titlist Liam Paro. (25-1, 15 KOs) via split decision. Hitchins is now The Ring No. 4 junior welterweight contender, while Paro fell to No. 6.

Both fighters are with Matchroom.

“What about Richardson Hitchins, who was out on the fucking street after Mayweather Promotions wouldn’t give him a fight. And I took him, and I built him, I got him to headline, I got him to mandatory position, and he become world champion? You wanna say how Matchroom brought him through to do that? No, you don’t, because you want to criticize.”