Quarter finals set in St Petersburg, Hua Hin

The second rounds are complete in St Petersburg and Hua Hin, and the quarter final match ups known.

St Petersburg 

Second round:

• qualifier Ekaterina Alexandrova defeated qualifier Tereza Martincova 7-5 6-2
• Aryna Sabalenka (4) defeated Alison Van Uytvanck 6-1 6-4
• Anastasia Pavlyuchenkova defeated Jelena Ostapenko (6) 6-4 6-4
• Kiki Bertens (2) defeated qualifier Ysaline Bonaventure 6-4 6-2

Quarter finals will be:

Petra Kvitová (1) v Donna Vekic (8)

Dasha Kasatkina (3) v wildcard Vera Zvonareva 

Qualifier Ekaterina Alexandrova v Aryna Sabalenka (4)

Anastasia Pavlyuchenkova v Kiki Bertens (2)

Hua Hin 

Second round 

• Magda Linette defeated Monica Niculescu 4-6 6-3 6-2
• Yafan Wang defeated Shuai Zhang (5) 4-1 (retired)
• Viktorija Golubic defeated qualifier Yingying Duan 7-6(4) 7-5
• Tamara Zidansek defeated qualifier Jennifer Brady 6-3 0-6 7-6(9)

Quarter finals will be:

Garbiñe Muguruza (1) v Dayana Yastremska (8)

Magda Linette v Yafan Wang 

Ajla Tomljanovic (6) v Saisai Zheng (4)

Viktorija Golubic v Tamara Zidansek