Borna Coric of Croatia downed No. 1 seed Sebastian Baez of Argentina 6-3, 6-4 on an upset-filled day at the Winston-Salem Open on Tuesday in North Carolina.

Coric hit seven aces to Baez's one and finished with a 16-5 advantage in total winners in the 81-minute match. Baez was just one of nine seeded players to lose his Round of 32 match on Tuesday.

Lucky loser Zachary Svajda took down No. 3 seed Francisco Cerundolo 6-4, 6-4; David Goffin of Belgium eased past No. 5 seed Luciano Darderi of Italy 6-2, 6-4; China's Juncheng Shang beat No. 7 seed Mariano Navone of Argentina 7-5, 6-3; Brazil's Thiago Seyboth Wild upset No. 8 seed Nuno Borges of Portugal 7-6 (2), 6-2; and qualifier Learner Tien outlasted No. 9 seed Fabian Marozsan 6-2, 6-7 (1), 7-6 (2).

Belgium's Zizou Bergs rallied past sixth-seeded Tomas Martin Etcheverry of Argentina, 4-6, 7-5, 6-3.

Italian No. 10 seed Lorenzo Sonego and French No. 12 seed Arthur Rinderknech avoided the carnage, winning their matches in straight sets. But Spanish wild card Pablo Carreno Busta defeated Kazakh 13th seed Alxander Shevchenko 6-2, 6-2 in just 69 minutes, and Christopher Eubanks beat No. 14 seed Hugo Gaston 6-1, 6-4 in just 56 minutes.

No. 15 seed Pavel Kotov advanced with a 6-4, 5-7, 6-2 win over Frenchman Alexandre Muller.

In evening action, No. 11 Alex Michelsen of the United States downed Hungary's Marton Fucsovics 7-6 (3), 6-4, and No. 17 seed Roman Safiullin of Russia topped France's Corentin Moutet 6-1, 7-5.

--Field Level Media