Alex Wassabi has been accused of using his elbows to land shots on rival Deji during their YouTube boxing fight.
Debutant Wassabi won the fight by split decision after the five-round main event at Wembley Arena last night.
But eagle-eyed fans spotted the American using his elbows and have demanded he grant his rival a rematch.
Sharing footage of the incident, one fan said: "Deji got tobbed, Wassabi used his elbows."
Another added: "Don’t know how to feel about the fight. Deji had some good shots but Wassabi was more offensive with an elbow?"
And a third said: "I accept Deji lost right, but if you watch carefully Wassabi uses elbows and headlocked Deji for a second. it wasn’t fair and I think it needs a rematch."
Other fans dismissed the idea that the result of the fight would have been different if Wassabi had been deducted a point for fouling.
"Even if points got deducted Wasabi still would have won. Deji didn’t land anything, he just slipped well," one fan said.
Another added: "Elbows happen all the time in boxing, this is nothing new" and another said: "I mean the ref didn’t take points away when Vitaly was getting head butted to hell. And those were on purpose; why would they for this accident elbow?"
The user was referring to the use of headbutts by Kristen Hanby in his fight with Vitaly which was eventually scored a draw.
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Hanby looked to be cruising to victory after the first two rounds but then started using his head, leaving his opponent furious.
No action was taken, however, unlike in an earlier fight when Ryan Taylor was disqualified for headbutting DK Money and leaving his opponent writhing on the canvas.
The main event came close to being stopped prematurely when a fan climbed into the ring in the second round.
The fight was paused and the intruder was unceremoniously removed by the fighters' teams.
