Kyrgios beat the former Australian Open finalist 7-6, 4-6, 7-6, 7-6, to make it to the last 16. "He was a guy I looked up to as a kid, still do, he's a great guy".
"I am happy to get through". "I'd never won a match on this court". I somehow just hung in and got a couple looks (at the serve).
"I know mentally I'm a lot better, as well".
After cursing himself for his decision to play doubles in near-40-degree heat the day before his third-round win over Jo-Wilfried Tsonga, Kyrgios has opted out of continuing with fellow Australian Matt Reid. "He has got it".
"I know it's going to be incredibly tough, but I'm not going to think about it right now". With his game already, he can do some damage.
But he raised his game again in the clinches of the tiebreak, pounding a return at set point that ricocheted harmlessly off Tsonga's racquet. Tsonga was heard to say "bring him here, he needs to come down here".
"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 told reporters. "You have to stop".
Yelling in French at the offending fan, Tsonga ignored the chair umpire's warnings to calm down and was given a code violation for unsportsmanlike conduct.
Dimitrov, now 26, has got closest with his trip to the last four at Wimbledon in 2014 and his part in a thriller of a Melbourne Park semi-final against Nadal previous year.
Spaniard Nadal has yet to give up a set in his three matches so far and the 31-year-old has a similar record in his three previous meetings with his fourth round opponent, Argentine world number 26 Diego Schwartzman.
"Even after losing the second set, I thought I was going to get a little glimpse of opportunity during the (third) set".
As the only native left in the draw, Kyrgios will carry the hopes of a nation into a blockbuster clash against Grigor Dimitrov, another supreme talent desperate to prove his major credentials.