Michael Venus hit out at Nick Kyrgios after bowing out of the men's doubles at the Australian Open on Tuesday.
The Kiwi and Tim Putz were beaten 7-5 3-6 6-3 by Kyrgios and Thanasi Kokkinakis in the quarter-finals at a loud Kia Arena.
But Venus was unhappy with Kyrgios, slamming the Australian for his antics.
"There'll always be his supporters and he'll always spin it in a way that helps him, but at the end of the day he's just an absolute k***," he told 1News.
"I think it just speaks for him. His maturity level, it's probably being generous to a 10-year-old to say it's at about that level."
Aussie, Aussie, Aussie @tkokkinakis & @nickkyrgios reach their first Grand Slam semifinal with a 7-5 3-6 6-3 upset over No.6 seeds Tim Puetz & Michael Venus.#AusOpen · #AO2022— #AusOpen (@AustralianOpen) January 25, 2022
: @wwos · @espn · @eurosport · @wowowtennis pic.twitter.com/5NEQrJWGZM
Kyrgios and Kokkinakis have embarked on a memorable run to the semi-finals of the men's doubles, with crowds flocking to their matches.
Despite his criticism of Kyrgios, Venus also praised the two-time grand slam singles quarter-finalist's talent.
"He's an unbelievable tennis player, what he does on the tennis court, what he can do out there, his tennis IQ on the court, it is amazing and he's definitely on that side of things one of the best players in the world," he said.
"But from the maturity side of things you see why he's never fulfilled his potential and probably never will."