Teenager Coco Gauff reached the quarter-finals of the US Open for the first time on Sunday with a 7-5, 7-5 victory over China’s Zhang Shuai.
The 18-year-old 12th seed from Atlanta advanced to a last-eight meeting with France’s Caroline Garcia after prevailing in 1hr 57minutes.
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Prior to this season, Gauff had never gone further than the third round at the US Open.
Gauff, who reached the final of the French Open in June, was forced to work hard for her victory against the skillful Chinese veteran Zhang.
However, the 33-year-old from Tianjin paid the price for a lack of composure at crucial moments.
Gauff broke the Chinese world number 36 to take a 6-5 lead in the first before holding to clinch the first set.