Berlin Open: Siniakova books spot in last 16

Qualifier Katerina Siniakova won against American Emma Navarro 6-4, 6-3 to reach the last 16 of the Berlin Open at Rot-Weiss Tennis Club.

Siniakova, ranked No 30, will face the winner of the match between Japanese wildcard Naomi Osaka and Chinese Qinwen Zheng, the No 6 seed, next.

Berlin WTA 500, other last-32 results (Rot-Weiss Tennis Club, grass, USD 922.573, most recent results first):

• Xinyu Wang vs. Ons Jabeur
• Veronika Kudermetova vs. Liudmila Samsonova
• Maria Sakkari vs. Victoria Azarenka
• Linda Noskova vs. Angelique Kerber
• Beatriz Haddad Maia vs. Ekaterina Alexandrova
• Naomi Osaka vs. Qinwen Zheng
• Donna Vekic vs. Jule Niemeier
• Marketa Vondrousova (5) beat Rebeka Masarova (Q): 6-4, 6-3
• Anna Kalinskaya beat Nao Hibino (Q): 2-6, 6-4, 6-2
• Daria Kasatkina beat Marta Kostyuk: 4-6, 7-6 (6), 6-3
• Zeynep Sonmez (Q) beat Arantxa Rus (LL): 3-6, 6-2, 6-1