Fourth-seeded Stefanos Tsitsipas fended off Benoit Paire 6-3, 7-5, 6-7 (2), 6-4 to advance to a fourth-round match against Taylor Fritz at the Australian Open.
Tsitsipas was runner-up at the French Open and reached the Australian Open semifinals last year.
No. 20-seeded Fritz had a 6-0, 3-6, 3-6, 6-4, 6-3 win over No. 15 Roberto Bautista Agut to reach the fourth round at a Grand Slam tournament for the first time.
The 24-year-old American, contesting his sixth Australian Open and 22nd major overall, recorded just his second win and seven head-to-head meetings with Bautista Agut, a 33-year-old Spaniard.
Maxime Cressy, another 24-year-old American, is into the fourth round at a major for the first time.
The No. 70-ranked Cressy beat Australian wildcard entry Chris O'Connell 6-2, 6-7 (6), 6-3, 6-2 and will next play U.S. Open champion Daniil Medvedev.
No. 9 Felix Auger-Aliassime had a 6-4, 6-1, 6-1 win over No. 24 Dan Evans, winning 14 of the last 16 games after it was 4-4 in the first set.
