Kyrgios had a comfortable straight sets victory over Brazilian Rogerio Dutra Silva 6-1 6-2 6-4 in his first Grand Slam match of the year.

The injury-plagued youngster began 2018 with a bang after claiming the Brisbane International a fortnight ago.

And the Canberra-born star admitted there were some nerves.

“I know I'm hitting the ball well, but to go out there in front of the crowd again, just trying to play well, I was a bit nervous going out there,” Kyrgios said.

“I’m happy to get through, I loosened up a little bit in the third set. He was kind of redlining a little bit. Made it a little bit more difficult for me to get into his service games. Ultimately, I thought it was a pretty good performance.

“If I had a five-set battle as well, I'd also take it as a positive. I know a couple guys today got through a gruelling five-set win. They can take that as confidence. They're having a tough test first to sort of make you lock into the rest of the tournament.”

He was also happy to recall his previous win over Viktor Troicki in the Rogers Cup last year and will meet the Serbian once again in the next round.

Troicki came from two sets down to down Australian Alex Bolt 6-7 4-6 6-2 6-3 6-4.

“He's got a good serve, he has a great backhand and he's a journeyman,” he said. 

“He's been on the tour for a long time and has won a lot of matches. In the Grand Slams, he's made the fourth round a lot of times. He knows the ups and downs that come in a Grand Slam match.

“I saw today, he was two sets to love down, and it obviously didn't faze him very much. He came back and won. That's not easy to do.

“There's not many people that come back from two sets to love down and win against an Aussie in Australia. He's a tough competitor.”