Novak Djokovic set up a blockbuster Australian Open quarter-final against Carlos Alcaraz but refused to do a post-match interview because of a row with the host broadcaster.

Djokovic has been riled by some of the fan behaviour at Melbourne Park and he was booed after declining to answer questions from former champion Jim Courier on court in the customary manner following his 6-3 6-4 7-6 (4) win over Jiri Lehecka, instead briefly thanking supporters for coming.

But the 10-time champion revealed in his post-match press conference that his ire was not directed at the crowd but at broadcaster Channel 9 following an incident ahead of his third-round match when presenter Tony Jones mocked a group of chanting Djokovic fans behind him by singing, “Novak is overrated, Novak’s a has-been, Novak kick him out”.

“A couple of days ago the famous sports journalist who works for the official broadcaster, Channel 9 here in Australia, made a mockery of Serbian fans and also made insulting and offensive comments towards me,” said Djokovic.

“And, since then, he chose not to issue any public apology. Neither did Channel 9. So, since they’re official broadcasters, I chose not to give interviews for Channel 9.

“I have nothing against Jim Courier or neither the Australian public. It was a very awkward situation for me to face on the court today. It’s unfortunate. I chose to say something to the crowd, but obviously wasn’t the time and space or situation for me to explain what I’m doing right now.

“I leave it to Channel 9 to handle this the way they think they see fit.”

It was an unexpected denouement to what had been a positive match for Djokovic, who looked sharp against in-form 24th seed Lehecka.

Now he and coach Andy Murray must prepare for by some distance the biggest match of the tournament so far against third seed Alcaraz on Tuesday.

Djokovic insisted the dispute does not add extra motivation, saying: “I’m very determined already. (I am) not using this to fuel my fire more.”

He added that he was willing to accept a fine for his stance, saying: “I feel like this is something that needs to be done.”

It will be an eighth meeting overall and fourth at a grand slam between the Serbian and Spaniard, with Djokovic having triumphed in the semi-finals at the French Open in 2023, while Alcaraz has won the last two Wimbledon finals.

Their last meeting came at Roland Garros in the Olympic final last summer, when Djokovic claimed an emotional first gold medal.

His fall in ranking to seventh means this is the earliest stage at a slam they will have done battle, and there is a huge amount on the line for both men.

Djokovic is bidding to win a record-breaking 25th slam title while Alcaraz can become the youngest man ever to complete the career Grand Slam.

Alcaraz only had to play two sets on Sunday because of the retirement through injury of Jack Draper.

The third seed, who has dropped only one set so far, said of the match-up with a smile: “This is not the right player to play in a quarter-final, I guess.

“I think in a grand slam, from quarter-finals to the final, those players are the best in the world. If it wasn’t Djokovic in the quarter-final, it could be another player who is in the top of the ranking.

“But, facing Novak, for me it’s not going to change anything if I’m playing him in a quarter-final or semi-final. Probably change a little bit if it is a final, obviously.

“Being in a quarter-final, I’m going to approach the match the same as I did in the previous matches against him, and let’s see. I know my weapons. I know that I’m able to play good tennis against him, I’m able to beat him.”

The final stages are shaping up to pit the leading players against each other, with second seed Alexander Zverev also making it through.

The German recovered from losing the second set to defeat France’s Ugo Humbert 6-1 2-6 6-3 6-2 and will next face 12th seed Tommy Paul, who beat a physically hampered Alejandro Davidovich Fokina 6-1 6-1 6-1.