Australian Max Purcell swatted 11 aces to pull off a 7-6 (4), 7-6 (2) upset of the No. 2 seed Tallon Griekspoor of the Netherlands on Wednesday in the third round of the Winston-Salem Open in North Carolina.

Purcell won 38 of 48 first-service points while advancing to the quarterfinals, where he will face fifth-seeded Czech Jiri Lehecka. Lehecka defeated Germany's Dominik Koepfer 6-3, 3-6, 6-4.

Top-seeded Croatian Borna Coric survived a tough test against the United States' Michael Mmoh, prevailing 6-4, 6-7 (3), 6-3. No. 4 seed Laslo Djere of Serbia downed the United States' Alex Michelsen 6-4, 6-4.

No. 12 seed Richard Gasquet of France rallied for a 2-6, 6-4, 6-4 victory over American Brandon Nakashima. Sixth-seeded Argentine Sebastian Baez also needed three sets to prevent an upset, capturing a 6-4, 4-6, 6-4 win against No. 9 seed Aleksandar Vukic of Australia.

No. 3 seed Sebastian Korda of the United States defeated No. 14 seed Marton Fucsovics of Hungary 7-6 (5), 6-3, and Argentina's Juan Manuel Cerundolo got past the United States' Omni Kumar 7-5, 6-3.

--Field Level Media