MIAMI (AFP) — Former world heavyweight champion Anthony Joshua knocked out YouTuber-turned-boxer Jake Paul in their controversial Netflix-backed bout in Miami on Friday.

Two-time world champion Joshua made hard work of defeating his vastly less experienced opponent, but finally made his superior size and power count in the later stages of the eight-round fight.

A mediocre contest at the Kaseya Center — with the two men reportedly splitting a mammoth purse of $184 million — descended into farce at times, with Paul repeatedly dropping to the canvas and grappling at Joshua’s legs.

At one stage even referee Christopher Young appeared to be losing patience, warning the fighters in the fourth round: “The fans did not pay to see this crap.”

As Paul tired, Joshua finally began to land punches with more regularity and after knocking down the American twice in the fifth round the end came swiftly in the sixth.

Joshua backed the 28-year-old into a corner and after teeing up Paul with a crunching left, delivered the knockout blow with a right to the chin that sent his opponent crashing to the canvas.

“It wasn’t the best performance,” Joshua, 36, admitted afterwards. “But the end goal was to get Jake Paul, pin him down and hurt him.”

“That was the request leading up, and that was on my mind. It took a bit longer than expected but the right hand finally found its destination.”

Joshua, meanwhile, praised Paul for lasting into the later rounds.

“I want to give him his props — he got up time and time again,” Joshua said.