Wang Qiang of China reacts during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China competes during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China competes during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China reacts during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China competes during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Elise Mertens of Belgium competes during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Elise Mertens of Belgium reacts during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Elise Mertens of Belgium celebrates during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China reacts during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Elise Mertens (L) of Belgium reacts during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Elise Mertens of Belgium competes during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China celebrates during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Elise Mertens of Belgium competes during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China reacts during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China reacts during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China competes during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China reacts during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China competes during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)

Wang Qiang of China reacts during the women's singles third round match between Wang Qiang of China and Elise Mertens of Belgium at the 2019 Wimbledon Tennis Championships in London, Britain, on July 6, 2019. (Xinhua/Lu Yang)