Nick Kyrgios has thumped Dusan Lajovic 6-3 6-1 in a powerhouse and typically entertaining performance to progress to the Miami Open round of 16.
The Australian world No.33 was far too strong for his 44-ranked opponent, slamming 12 aces and winning 81 per cent of first-serve points.
He also produced two underarm serves, including an ace, among several trick shots.
The often controversial 23-year-old found himself in a mid-match verbal altercation with a spectator before the man was ejected from the venue.
Kyrgios will next meet Borna Coric for a place in the quarter-finals after the Croatian overcame Frenchman Jeremy Chardy.
Earlier, world No.1 Novak Djokovic was stretched to three sets but powered through the decider against Federico Delbonis.
Djokovic, aiming for a seventh title in the Masters 1000 event, overcame a second-set hiccup to prevail 7-5 4-6 6-1.
“We were very close in the beginning of the third set … It could have gone a different way,” Djokovic said.
Next up for Djokovic will be Spanish 22nd seed Roberto Bautista Agut, who prevailed 6-4 6-4 over Italian 15th seed Fabio Fognini.
Defending champion John Isner was broken in the first game but he held the rest of the way and served 16 aces to beat Albert Ramos-Vinolas 7-5 7-6 (8-6).
Isner, now 33, won the biggest title of his career in the tournament a year ago.
The American seventh seed will face Kyle Edmund who defeated 12th seed Milos Raonic 6-4 6-4.
Others to progress to the last 16 on Sunday were 17th-seeded Georgian Nikoloz Basilashvili and 18-year-old Canadian qualifier Felix Auger Aliassime.