"To get a win against him is a dream come true", added Kyrgios, who will face ATP Finals victor Grigor Dimitrov next.
I missed a backhand, then I went to the net not in a really bad condition, but he play a passing shot and he touch the net.
Kyrgios said he had felt particularly tense because the Hollywood star Will Smith was watching from the sidelines.
After posting vision of him shouting during the match with Kyrgios glaring at him from the court before security guards dragged Zhu from the stand, he revealed the act had been a dare, and that the weird screech the wannabe comedian let out was apparently a "sex noise".
Kyrgios (the tennis player) returns to the court tonight to face Frenchmen Jo-Wilfried Tsonga, although it's not clear if Christos and his T-shirt will return for another airing.
"Because on the set point, in between the first serve and the second, the guy was talking to me and telling me, 'You are under pressure now, you are under pressure now, ' when I was bouncing my balls", Tsonga said.
When Kyrgios was given a code violation for not being ready to start in the allotted time, tempers could have frayed but the Australian kept his cool and just smiled.
A quick glance at some of the final stats leaves one pondering just how Kyrgios won in four sets. A couple of aces helped Kyrgios get out of trouble at 4-5, 15-30.
Kyrgios was on the receiving end of good fortune in the first set tiebreak, when two Tsonga errors - including a double fault on set point - handed him the advantage.
It was also a change of scenery for Nadal, who was playing on Margaret Court Arena - the No. 2 venue at Melbourne Park - while local hope Nick Kyrgios beat Jo-Wilfried Tsonga in a night match on the main court.
Kyrgios, who has been a controversial figure for most of his career, divides opinion among the public Down Under, but what Australians love more than anything else is a victor. "I've always played the same way". "Fucking so fucked up, so dumb, so, so dumb".
Ostapenko, playing with a heavily bandaged thigh, dominated the second set but was unable to sustain her level.
The third set was an exhibition of serving from both men. Tsonga had a set point at 6-5 but Kyrgios saved it with a big forehand victor.
Just four seeds remain in the bottom half of the draw; Wozniacki, Rybarikova, 32nd seed Anett Kontaveit and tournament favourite Elina Svitolina.
That's it. But nothing really important.' Here you can see the moment during the match when Tsonga tells the umpire something about that fan. I didn't play good tennis on the big point.