Wang Qiang returns the ball during a match of CTA (China Tennis Association) Tour between Wang Qiang and Zou Xinyi in Anning, southwest China's Yunnan Province. Aug. 4, 2020. (Photos: Xinhua)

Wang Qiang returns the ball during a match of CTA (China Tennis Association) Tour between Wang Qiang and Zou Xinyi in Anning, southwest China's Yunnan Province. Aug. 4, 2020.

Wang Qiang returns the ball during a match of CTA (China Tennis Association) Tour between Wang Qiang and Zou Xinyi in Anning, southwest China's Yunnan Province. Aug. 4, 2020.

Wang Qiang returns the ball during a match of CTA (China Tennis Association) Tour between Wang Qiang and Zou Xinyi in Anning, southwest China's Yunnan Province. Aug. 4, 2020.

Wang Qiang serves during a match of CTA (China Tennis Association) Tour between Wang Qiang and Zou Xinyi in Anning, southwest China's Yunnan Province. Aug. 4, 2020.

Wang Qiang serves during a match of CTA (China Tennis Association) Tour between Wang Qiang and Zou Xinyi in Anning, southwest China's Yunnan Province. Aug. 4, 2020.

Wang Qiang returns the ball during a match of CTA (China Tennis Association) Tour between Wang Qiang and Zou Xinyi in Anning, southwest China's Yunnan Province. Aug. 4, 2020.

Wang Qiang returns the ball during a match of CTA (China Tennis Association) Tour between Wang Qiang and Zou Xinyi in Anning, southwest China's Yunnan Province. Aug. 4, 2020.

Zou Xinyi serves during a match of CTA (China Tennis Association) Tour between Wang Qiang and Zou Xinyi in Anning, southwest China's Yunnan Province. Aug. 4, 2020.