Chinese Qinwen Zheng beat Canadian Bianca Andreescu 7-5, 5-7, 6-2 to advance to the last 8 of the National Bank Open at the Aviva Centre in Toronto on Thursday night.
Zheng, ranked No 51, will play Czech Karolina Pliskova, the No 14 seed, next.
The 19-year-old Chinese edged out Canadian wildcard Rebecca Marino (3-6, 7-6 (5), 6-4) and benefited from the abandonment of Tunisian Ons Jabeur, the No 5 seed (6-1, 2-1) earlier in the tournament.
In the previous rounds of the Canadian Open, Andreescu, ranked No 53, won against Russian Daria Kasatkina, the No 11 seed (7-6 (5), 6-4) and Frenchwoman Alize Cornet (6-3, 4-6, 6-3).
Toronto WTA 1000, other last 16 matches and results (Aviva Centre, hard, USD 2.527.250, most recent results first):
- Belinda Bencic vs. Garbine Muguruza
- Karolina Pliskova beat Maria Sakkari (3): 6-1, 6-7 (9), 6-3
- Yulia Putintseva beat Alison Riske-Amritraj: 6-3, 7-5
- Beatriz Haddad Maia beat Iga Swiatek (1): 6-4, 3-6, 7-5
- Jessica Pegula (7) beat Camila Giorgi: 3-6, 6-0, 7-5
- Simona Halep (15) beat Jil Teichmann: 6-2, 7-5
- Coco Gauff (10) beat Aryna Sabalenka (6): 7-5, 4-6, 7-6 (4)
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