Radwanska reaches last-eight at Shenzhen

Defending champion Agnieszka Radwanska has reached the quarter-finals of the Shenzhen Open with a 6-0 6-3 win over Sorana Cirstea.

The top-seeded Pole broke Cirstea six times, a day after being forced to save three match points in a lengthy three-set win over Chinese wild-card entry Duan Ying-ying.

Radwanska will next face Alison Riske of the United States, the player she beat in last year’s final. Riske advanced by beating Tsvetlana Pironkova on Bulgaria 6-1 6-1.

Third-seeded Johanna Konta also reached the last eight after rallying to beat Vania King 1-6 6-3 6-2 while Wang Qiang defeated seventh-seeded Monica Niculescu 7-6 (1) 6-4.

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