World No.1 Novak Djokovic isn't ruling out another Nick Kyrgios boilover in his Australian Open quarter-final against Andy Murray.
World No.1 Novak Djokovic has joined the Nick Kyrgios fan club and says "anything is possible" for the young tennis sensation at Melbourne Park this week.
Kyrgios takes on Wimbledon and US Open winner Andy Murray on Tuesday night in one of the most-anticipated Australian Open quarter-finals in years.
Murray is a hot favourite to end the Australian's campaign, but Djokovic isn't writing off the 19-year-old's chances of claiming another big grand slam scalp.
"Fantastic job he has done here in the tournament first round, going through some physical pain on the court, then managing to win in five his last match against (Andreas) Seppi," Djokovic said.
"I watched a little bit. It was high-quality tennis.
"He's showing some emotion on the court and the crowd gets into it. He has a lot of support.
"He's also showing some mental strength in the tough moments. That's a virtue that he possesses and he's got to nurture that in order to be where he wants to be.
"I'm sure he has high ambitions in his career, in his life. He's got the shots. He's got the game.
"Especially here in Australia, he's got home-court advantage. Anything is possible with Nick."
Djokovic's lavish praise comes after eight-time grand slam champion Ken Rosewall, who secured the first of his Australian titles at 18, claimed Kyrgios could pull off the unthinkable and win the Open.
"I wouldn't like to think it's too early. There's been plenty of other young fellas who have done well, particularly (Bjorn) Borg," Rosewall said.
"If he did win a grand slam event as a 19-year-old, it would certainly be a great start to his career."
Kyrgios will be the first Australian to appear in a quarter-final at Melbourne Park since Jelena Dokic's similarly captivating run to the last eight in 2009.