- Kyrgios exchanges jibes with fan in Miami
- Fan later ejected as Kyrgios defeats Lajovic
The 23-year-old Kyrgios reacted after he was taunted by a spectator sat behind him in the first set of his 6-3 6-1 victory against Dusan Lajovic.
"Did you get a free ticket? Why are you watching me on a Sunday night?" Kyrgios shouted up to the stands. "You got nothing else to do on a Sunday night?"
The man in return gestured at Kyrgios, who three points later shot back with "Bro, where's your fam?"
While his female companion remained seated, the spectator was eventually escorted out by stewards and Kyrgios waved to him from the court.
Addressing the issue after the game, the 23-year-old said that he "had a bit of fun with it.
"I knew that I was going to get him kicked out," he added. "I loved it, I loved every single bit of it. I think the crowd loved it."
Kyrgios explained how the incident originated with the man joking about his haircut.
"At a change of ends he literally just said, 'You're a d*** .... He said I had a s***ty haircut. And you know what? I haven't been to a barber shop in a couple of days, so he was pretty right," said the world No. 33.
On the court, Kyrgios produced a bag of tricks as he swept past Lajovic.
The first set alone saw him twice experiment with underarm serves -- one of which resulted in an ace -- and win a rally that included a tweener (through-the-legs shot).
A semifinalist in Miami in 2016 and 2017, the Australian next plays Croatian Borna Coric in the round of 16.