Perth WA, Australia, 3 January 2017 | AAP

Australian firebrand Nick Kyrgios has told everyone to “relax” about his niggling knee injury, saying it’s nothing serious and won’t hinder his Australian Open campaign.

Kyrgios hobbled at times during his 7-5 6-4 Hopman Cup win over Czech Adam Pavlasek on Tuesday night.

The world No.13 rushed through points in the first set to ensure he didn’t get stuck in any long rallies.

He even unleashed a series of monster second serves in a bid to make the points quick.

In one game, he served two double faults in a row attempting to go for a second-serve ace.

Kyrgios moved much better in the second set as his strapped left knee warmed up, and after the match he allayed fears about the injury.

“I was feeling it a little bit. But as the match went on and I got warmer (it was ok),” Kyrgios said.

“That’s the key to the knee – I’ve just got to get warm before I run out.

“I didn’t really have too much time to warm up before this match. I was in the physio getting it taped, and I ran out of time.

“So next match I’m going to do a better warm up and go out there with a bit of sweat and warm it up a little it.”

On Sunday, Kyrgios claimed he hurt his left leg in a minor basketball mishap just before the Hopman Cup.

But on Tuesday, the 21-year-old said he injured it while training a few weeks ago, and it was so minor that he didn’t even undergo scans on it.

Kyrgios’ win gave Australia a 1-0 lead in the tie ahead of Daria Gavrilova’s clash with world No.166 Lucie Hradecka.

Australia, who lost their opening tie 2-1 to Spain, must beat the Czech Republic to have any hope of reaching Saturday’s final.

The US currently lead Group A after posting 3-0 wins over the Czech Republic and Spain.

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