The YouTube boxing fight between Deji and Alex Wassabi descended into chaos when a fan jumped into the ring.
The bout was into the second of five rounds when the fan climbed through the ropes, forcing the contest to be stopped.
The intruder was immediately jumped on by the fighters' training teams before he was hit over the head by a stool and removed from the ring.
The fight, which was the main event of the latest Showstar Boxing card, was paused before the ring announcer pleaded for calm as he told fans the bout would be called off if calm did not ensue.
The fight eventually restarted as Deji fell to his third successive defeat with two of the judges rightly siding with debutant Wassabi.
"I did great, I didn't know who was going to win at the end," said the winner. "I didn't realise how tough it was going to be.
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"These people love their people and they showed it; I didn't hear my name once.
"Deji, I just wanted to compete and if it wasn't for you that dream wouldn't have come true.
"I want to get back in... I don't know when the next YouTube event is."
The beaten Deji said: "I guess I think too much when I box and I don't punch enough. Alex did well, I can't dispute that."
Having vowed to quit if he lost, Deji asked the crowd if they wanted him to fight again, which they answered in the affirmative.
He and Wassabi then agreed to a rematch. "If you guys want me to fight again, I'll show you what I can do," he added.
Who did you score the fight to? Let us know in the comments section below
The intruder was just the latest in a long list of dramatic moments at the event at Wembley Arena on Saturday night.
The fight between Ryan Taylor and DK Money was stopped in the first round when Taylor inexplicably headbutted his opponent.
Taylor had complained of a low blow but there was no evidence of such a foul being committed and he was promptly disqualified.
Chaos ensued in the immediate aftermath as fans crowded the ring, forcing the announcer to demand they take their seats.
There was more fouling in the fight between Vitaly and Kristen Hanby.
Hanby had dominated the opening two rounds but then resorted to headbutting his opponent.
The referee stopped the fight to admonish Hanby but did not punish the fighter with the bout ultimately scored a draw.
