Top seed Rafa Nadal was rattled by a feisty challenge from Diego Schwartzman but held firm to fend off the diminutive Argentine 6-3 6-7 (4) 6-3 6-3 and reach his 10th Australian Open quarter-final on Sunday. Kyrgios, seeded 17, needed three tiebreakers to win a crunch match with the former finalist 7-6 (7/5), 4-6, 7-6 (8/6), 7-6 (7/5) in 3hr 17min in a spectacular night match on Rod Laver Arena.
"Last year after the Australian Open I was really struggling mentally", Kyrgios said after Friday's victory.
The squall passed quickly, though, and he knuckled down to take Kyrgios into a third tiebreak, storming to a 5-2 lead after another charge to the net. I know how tough she is. You know, I was talking to him in the third set.
"People think I'm cool but I just wanted him to think I was the coolest person ever".
No matches have been called off or roofs closed at the opening Grand Slam of the year despite the soaring temperatures, with tournament organiser Craig Tiley defending the decision.
"It was a good test but at the same time I prefer to win in two hours than in four", Nadal said.
But we have seen a different Kyrgios during the 2018 Australian Open, and there is something he has been doing that hasn't received enough attention during the tournament.
"But he played well and he played aggressive".
Nadal lost last year's Australian Open final to Roger Federer, but went on to regain the No. 1 ranking and win the French and U.S. Open titles before bringing his season to a premature end because of an injured right knee.More news: Donald Trump's appointee resigns after saying: 'I don't like gay people'
"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, then I lost it and [was driven] a little bit insane because it was not fair".
"I'm expecting a tough fight". Dimitrov has proven his prowess in the big moments on Rod Laver Arena, where the fourth-round match will be played. "It probably helps my confidence, knowing I can resist nearly four hours on court". But against Rafa is not easy playing four hours in aggressive form and nothing.
He hit Zverev with a fifth set bagel to win 5-7 7-6 2-6 6-3 6-0.
The 24 seed had two break chances for four-all in the second and would convert to level the set.
Suarez Navarro became the first player through to the quarterfinals as she dug herself out of a hole to beat Estonian Anett Kontaveit 4-6 6-4 8-6 on Sunday.
His first real troubles came in the seventh game of the set after a missed volley and a forehand error put him triple break point down.
He endeared the crowd with the scampering around the court and his astonishingly powerful groundstrokes for one so small in stature.
"It was an interesting match, he made a strong start but I took control at the end of the second set".