Fournier had slowly started to develop something of a foothold in the fight after a slow start after previously complaining the 29-year-old had hit him in the back of the head.
Such a controversial ending was hardly mentioned in the aftermath of the fight as KSI quickly turned attentions to Tommy Fury.
The pair squared off inside the ring and vowed to fight later this year after Fury’s win over Jake Paul in February.
Still, perhaps unsurprisingly, Fournier hit out at KSI.
“He cheated, it’s clear, you’ve all seen the replays. He hit me with a clean elbow,” he said.
“When you’re fighting the promoter on his own show - I’ve never been cheated like that… He should be disqualified, that should go down as a loss.”