Jake Paul, the brother of Logan Paul, lashed out in the aftermath of his sibling's decision loss to Youtube rival KSI.

In a battle of social media stars, KSI won a six round split decision over Logan Paul on Saturday night at the Staples Center in Los Angeles. Their fight, which showcased world champions Billy Joe Saunders and Devin Haney on the undercard, was streamed live on DAZN. 

There was controversy in the fourth around, when referee Jack Reiss deducted two points from Paul, who scored a knockdown on KSI.

According to the referee, he took away one point because Paul was holding the head of KSI in place to land an uppercut, and he deducted an additional point because Paul hit KSI while he was down.

The decision by Reiss was the difference in the scores - as KSI won on two cards with scores of 57-54 and 56-55, while Paul won on the third card with a score of 56-55.

Jake Paul, who himself is a very popular Youtube star with nearly 20 million followers, stated numerous times the the sport of boxing is "rigged" and made allegations that DAZN EVP Joe Markowski was hanging out with KSI the night before the fight. 

"In Manny Pacquiao vs. Marquez, did Manny Pacquiao get two points taken away [when Marquez was hit while down in first fight]? And he's Manny Pacquiao. No warning? Nothing? Two points gone and it changes the decision of the fight. Logan is the better fighter, more technical. KSI was just going out and throwing punches... he got lucky tonight, that's the way the cookie crumbles and respect to KSI," Jake Paul said.

"At the end of the day it's bullsh-t, there is nothing you can do though. It's over and they will probably never fight again, so chalk it up to the f---ing game. I think the commission should contest it. If they don't flip that decision, you know, then it's just bullsh-t.

"At the end of the day, I've been in this sport for a year now... and I probably shouldn't be saying this - but all of this sh-t is f---ing rigged. You see people wining and dining each other. You see people at the Staples Center... Who was at the Staples Center last night with KSI? Joe Markowski from DAZN. This sport is rigged, for sure, 100%.

"The short amount of time I've been here [in boxing], I've heard multiple stories about people paying stuff off, choosing fights.."