American Frances Tiafoe has dumped Australia's Aleksandar Vukic from the Canadian Open in Toronto, setting up a clash with another Aussie, Alex de Minaur.
Vukic took the tournament's seventh-seed to three sets before going down 6-3, 4-6, 6-3 on Friday.
Tiafoe will now play de Minaur in the round of 16 with the ninth seed advancing after fellow Aussie Christopher O'Connell withdrew.
After dropping the opening set, Vukic fought back in the second, breaking Tiafoe in the opening game.
He also had an early break point in the deciding set but failed to capitalise.
Tiafoe then broke in the eighth game before serving out the match.
In other matches, second-seeded Taylor Fritz of the US beat Canadian Gabriel Diallo 6-4, 6-2 to set up a fourth-round clash with 19th-seed Jiri Lehecka of Czechia.
Lehecka beat 15th-seeded Arthur Fils of France 3-6, 6-3, 6-4.
In the afternoon session, sixth-seeded Andrey Rublev of Russia beat Lorenzo Sonego of Italy 5-7, 6-4, 6-3.
Rublev will face Alejandro Davidovich Fokina of Spain, a 6-2, 6-4 winner over Czech Jakub Mensik.
"In the second and third sets, I was able to play more aggressive, fewer mistakes," Rublev said.
"Let's see what's happening next, I'm super excited and motivated."
