By Nick Kyrgios' standards, it was tame, but the Australian has once again voiced his frustrations on how he was playing on the court.This time, by yelling “get up” after he sent his shot out of play.The Australian’s ranting proved to be especially irksome as this was meant to be the new calm and collected Nick Kyrgios – not the tempestuous, racket throwing, argumentative, and borderline abusive Kyrgios of old.How disappointing it was for those in the Rod Laver Arena then that in between some simply wonderful tennis by both players, Kyrgios spent much of the first and second sets screaming up at his box – apparently there was a problem with his racket strings.“You had all day to figure it out,” he said at one point.This match marked a return of Kyrgios' ironic clapping, head shaking, and his petulant rhetorical questioning of why this was happening to him. This makes it all rather strange then that he waited until the middle of the second set to ask for his racket to be re-stringed.All this put the Australian 22-year-old off his game and he found himself two sets down against his opponent and world number three Grigor Dimitov, who himself suffered a scare in the second round when he nearly crashed out against American Mackenzie McDonald.Following the match, Dimitov put it best when he said it was frustrating to play against Kyrgios, but he was happy to get the job done and go through to the quarter-finals on Tuesday against British number two Kyle Edmund.“Playing against Nick is always tricky.“Two weeks ago I lost against him, and [again] he was serving unbelievable, playing unbelievable. He fought really hard. It’s one of those matches you have to take any opportunity you have.“Even when I was serving for the match, I felt it wasn’t over. I’m just glad to get through.” The 26-year-old said.When he was not being petulant on the court, there were moments when the 22-year-old’s tennis shone.Realising that if he didn’t try and put the faulty racquet strings behind him quickly he would be looking at a three straight set defeat, the 22-year-old upped his game.

The Australian managed to get his impressive serve going, managing 36 aces during the match with his second serves consistently reaching an eye watering 203 kilometres per hour.

As the third set went on, Kyrgios' forehand started to come into play, allowing the 22-year-old to eventually win the third set 4-6. 

But, in the end Dimitov proved to be too strong, too canny, and too collected to lose from two sets up, taking the match 7-6, 7-6, 4-6, 7-6.

Shame it took Kyrgios two sets to sort himself out really, if he played like he did in the third from the get go, then this could quite easily have become a classic.