At Novak Tennis Center
Surface: Red clay
BELGRADE (AP) _ Results Friday from Belgrade at Novak Tennis Center (seedings in parentheses):
Round of 16
Viktoriya Tomova, Bulgaria, def. Leylah Annie Fernandez, Canada, 6-3, 4-6, 6-2.
Ana Konjuh, Croatia, def. Nadia Podoroska (5), Argentina, 6-4, 6-3.
Maria Camila Osorio Serrano, Colombia, def. Aliaksandra Sasnovich, Belarus, 6-4, 6-2.
Paula Badosa (4), Spain, def. Rebecca Peterson (7), Sweden, 6-2, 6-4.
Viktoriya Tomova, Bulgaria, def. Reka Luca Jani, Hungary, 6-1, 2-6, 7-5.
Alison van Uytvanck and Greet Minnen, Belgium, def. Zhang Shuai and Xu Yifan (3), China, 6-2, 6-1.
Aleksandra Krunic and Nina Stojanovic (4), Serbia, def. Vera Zvonareva, Russia, and Timea Babos, Hungary, 6-2, 6-4.
Aleksandra Krunic and Nina Stojanovic (4), Serbia, def. Alison van Uytvanck and Greet Minnen, Belgium, 6-0, 6-2.