Magda Linette got back to winning ways in Guangzhou, beating Zakharova to move on in the draw. A few days earlier in Osaka, she fell to Katerina Siniakova, who took the seventh meeting of their long-running rivalry and reached the quarterfinals.
Linette's win over Zakharova in Guangzhou was a welcome bounce-back after Osaka.
In Osaka, Siniakova beat Linette once more to book a quarterfinal spot.
Linette and Siniakova have now faced each other seven times on tour.