American Bernarda Pera cruised to an impressive 6-4, 6-1 straight-set victory against No. 1 seed Barbora Krejcikova of the Czech Republic on Wednesday in the round of 16 of Tennis in the Land in Cleveland.

Despite tallying just one ace, Pera won 20 of 28 first-serve points (71.4 percent) and 14 of 18 points on the second serve (77.8 percent) to pull of the upset. She also committing just two double faults compared to Krejcikova’s four.

Fellow American Madison Brengle followed in Pera’s footsteps, battling back to upset third-seeded Russian Ekaterina Alexandrova 3-6, 7-5, 7-5. China’s Shuai Zhang also defeated a seeded opponent, but did so on a walkover, as Italian No. 2 seed Martina Trevisan withdrew from their match due to a thigh injury.

In other action, Liudmila Samsanova of Russia made quick work of Germany’s Laura Siegemund with a 6-2, 6-1 victory.

Championnats Banque Nationale de Granby

No. 10 seed Marta Kostyuk of Ukraine rallied from a first-set loss to defeat Canadian Marina Stakusic 6-7 (3), 6-4, 6-1 in round-of-16 action at Granby, Quebec.

Kostyuk avoided the upset by converting 7 of 13 break points (53.8 percent) and winning 55 of 92 service points (59.8 percent). After losing five serves across the first set and its tiebreaker, she only lost one for the remainder of the match.

Rebecca Marino fared much better than her fellow Canadian, edging No. 3 seed Jasmine Paolini of Italy 4-6, 6-1, 6-2. France’s Diane Parry and Germany’s Tatjana Maria also earned wins as underdogs, toppling eighth seed Tereza Martincova of the Czech Republic and fourth seed Anna Bondar of Italy, respectively.

Australian ninth seed Daria Saville swept Canada’s Katherine Sebov 6-1, 6-0, and China’s Xiyu Wang was a 7-6 (4), 6-1 winner over Cadence Brace of Canada.

Also, No. 1 seed Daria Kasatkina of Russia completed a 6-3, 6-2 victory over Poland’s Magdalena Frech. Play was halted Tuesday due to rain.

–Field Level Media