Zambian boxer Mbachi Kaonga launched a furious verbal assault on the judges after losing his Commonwealth Games bout against Australia's Clay Waterman.
Semifinal-bound Waterman edged past Kaonga in a 4-1 split decision on Wednesday evening to book his spot in the final four of the 81kg division.
Kaonga was gobsmacked by the decision and quickly made it known, launching an abusive tirade during Waterman's ringside interview with a New Zealand broadcaster.
The Zambian then fired up at reporters, accusing the judges -- who hailed from China, Turkmenistan, Canada, England and the United States -- of hometown bias.
"I f---ing won that fight. This is bullshit," Kaonga said. "They are killing amateur boxing.
"Just because... it is his home ground, you give him the f---ing fight when he did not (win) the fight."
A bemused Waterman said he had been expecting a unanimous decision in his favour.
"I don't know how you can call it bullshit when he pretty much ran away the whole fight," the Queenslander said.
"I just thought I was in control the whole fight. Oh well, each to their own."
Waterman will face Welshman Sammy Lee in the semi-finals on Friday.
A fifth-generation boxer and former junior world champion, the 22-year-old is confident of going all the way in front of his home crowd.
"I definitely can beat anyone here, I've just got to turn up on the day," Waterman said.
"The first day I (felt nervous) but I'm starting to feel good now."