He will have nightmares about an easy volley he put into the net on the first point, which gave Nadal the impetus and the two-times SW19 victor saw it out for an impressive win that he enjoyed.
The 24-year-old vowed to return to the All England Club but said he didn't know whether major success would ever follow him. "Travelling with him to Cape Town and playing for the benefit of children is something I am very excited about", he said.
In the third set, there was that "dangerous" ball - Nadal's word - he sent toward the Spaniard, who blocked it with his racket at the last second.
World number one Barty has even closer ties with the Australian women's cricket team as she played alongside some of them during her 17-month hiatus from tennis when she played professional Big Bash Cricket in her home country. "I got thousands of messages from people I know and from people I don't know".
The King of Clay, who's coming off the back of a French Open title, won 6-3, 3-6, 7-6, 7-6 in a highly entertaining contest.
All of that left everyone rubbing their hands with excitement when the draw was made last week, and that is before Kyrgios' win at SW19 in 2014, when he stunned Nadal in the fourth round as a 19-year-old, is taken into account. That will come as no surprise to Kyrgios, who predicted he would lose when replying to a post on Instagram, while his reported presence in the Dog and Fox pub in Wimbledon village until 11.30pm on the eve of the match is sure to be a talking point.
It is a match that Nadal will not have wanted so early in the tournament, considering it will be only his second outing on grass this summer and that Kyrgios has won three of their six previous meetings.
Wimbledon 2019 - Serena Williams made to work for opening win at Wimbledon
Serena Williams and Maria Sharapova also feature in the loaded first quarter of the women's draw and play later Tuesday. He kept me nervous for a set and a half". "The crowd was cheering loudly and I had to take a few seconds to absorb it".
Nick Kyrgios aces Nadal with an underarm serve! He produced the same tactic twice on Centre Court, winning the point on each occasion.
But he had cooled down by the time he fronted the world's media and had a more measured outlook on the situation.
"If I do something outrageous, I get destroyed in the media for it. Why do I have to wait for him to get into his rhythm every time?" Normally against me and the top guys, he wants to try hard.
"What do you want from me, man?"
R: If you hit someone with the ball.
"Going into this match, he's one of the greatest tennis players of all time", Kyrgios was quoted as saying by The Guardian.
Kyrgios described the official as "a disgrace" during the match and his opinion had not mellowed in the aftermath.
"The umpire today was horrendous".