Nick Kyrgios has hit back at world number one Novak Djokovic as the war of words between the pair continued at the Australian Open.

Kyrgios was as hot-headed as ever during his first-round match against Frederico Ferreira Silva at Melbourne Park.

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He swept aside Ferreira Silva in straight sets, 6-4 6-4 6-4, in fairly straightforward fashion, but between points let rip with his camp on numerous occasions.

After the match, Kyrgios was asked by reporters for a reaction to Djokovic saying he had no respect for him off the court, and he duly responded.

"Here we go. It's a strange one for me, because, you know, I read his comments, he said he doesn't respect me off the court," Kyrgios said.

"I'm, like, it actually would make complete sense to me if he was like, 'Look, I don't respect the guy on the court,' because I understand if he doesn't agree with some of my antics on the court that I have done in the past.

But I'm not quite sure how he can't respect me off the court. I feel like I've gone about things extremely well, especially during the pandemic.

"I was driving around delivering food to people during the pandemic that didn't or couldn't get the supplies. I was extremely careful about what I was doing. I didn't want to spread the virus to anyone. Now I'm actually trying to donate meal kits to people that need food. I have my foundation.

"So it's very strange to me as to why he would say he doesn't respect me off the court. I actually do a lot off the court.

He's a very strange cat, Novak is. Heck of a tennis player, but unfortunately someone that's partying with his shirt off during a global pandemic, I don't know if I can take any slack from that man. That's as bad as it gets for me.

'That's as bad as it gets for me' - Kyrgios hits back at 'very strange cat' Djokovic

The Australian then went on to add his thoughts on the greatest-of-all-time debate.

"I think in my opinion I believe Roger is the greatest of all time. With his skill set, the way he plays the game, I think it's pure," he continued.

"I actually think talent-wise Nadal and Djokovic aren't even close to Roger. Talent-wise, just purely based on talent the way Federer plays, his hands, his serving, his volleys, untouchable."

Earlier, during his match, the 25-year-old let out his frustrations on his supporters' box, asking to have one member of his entourage removed.

'Tell your girlfriend to get out of my box!' - Kyrgios lets rip mid-match

Earlier in the match he again berated members of his box for apparently not giving him sufficient support.

'Are you guys awake?' - Watch Kyrgios get angry with his box after point

The Australian will next take on 29th seed Ugo Humbert of France in the second round.

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