Joseph Parker retained his WBO heavyweight title with a majority decision victory over Hughie Fury in Manchester.
One judge ruled the contest a 114-114 draw while the other two gave it to the New Zealander on a 118-110 margin.
Fury reacted with angry disbelief to the wide scores, following a contest that appeared to be reasonably close throughout. It was the first career defeat for the cousin of former champion Tyson.
Parker was the aggressor with Fury attempting to counter but neither man landed particularly damaging shots or scored a knockdown.
"I thought I had done enough, I don't know what happened with the judges," Fury said afterwards.
Parker, now 24-0, understandably disagreed: "He put up a good fight. He did move well and he was really awkward but I felt we won the fight."
Fury's promoter Mick Hennessy was crestfallen with the decision and compared his charge's display to that of Muhammad Ali.
Peter Fury believes the boxing authorities have robbed son Hughie of a world title @pasport #ParkerFury pic.twitter.com/acyIqo047F
— Rich McCarthy (@VJRichMcCarthy) September 24, 2017
He told BBC Radio 5 live: "I thought he skated it, it was an absolute masterclass, shades of Ali. It was beautiful boxing in the heavyweight division.
"Parker wasn't even in the fight, any punches he was throwing were either missing or hitting elbows or hitting gloves, it was very rare he got through with a clean shot. Hughie absolutely skated that fight.
"That is probably one of, if not the worst, decisions I've ever seen in my life, it was disgusting, absolutely disgusting."
Peter Fury, Hughie's father and trainer, was more measured in the aftermath, saying: "I thought he did win it but I wanted him to do more, I wanted him to use the right hand, I wanted him to be more confident and let his shots go.
"I still had him the clear winner because Joseph missed a hell of a lot. He's not had a good decision but there you are, this is boxing."
