BEIJING, CHINA - OCTOBER 09: Elise Mertens of Belgium returns a shot against Iga Swiatek of Poland during the Women's Singles quarterfinal match on day ten of China Open at the National Tennis Center on October 09, 2026 in Beijing, China. (Photo by Yanshan Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 09: Elise Mertens of Belgium returns a shot against Iga Swiatek of Poland during the Women's Singles quarterfinal match on day ten of China Open at the National Tennis Center on October 09, 2026 in Beijing, China. (Photo by Yanshan Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 09: Elise Mertens of Belgium returns a shot against Iga Swiatek of Poland during the Women's Singles quarterfinal match on day ten of China Open at the National Tennis Center on October 09, 2026 in Beijing, China. (Photo by Yanshan Zhang/Getty Images)

Belgium's Elise Mertens hits a return to Poland's Iga Swiatek during their women's singles quarter-final at the China Open tennis tournament in Beijing on October 9, 2026. (Photo by Greg Baker / AFP via Getty Images)

Serbia's Novak Djokovic walks between points during his match against Poland's Hubert Hurkacz during their men's singles match at the Shanghai Masters tennis tournament in Shanghai on October 9, 2026. (Photo by Hector RETAMAL / AFP via Getty Images)

Serbia's Novak Djokovic prepares between points during his match against Poland's Hubert Hurkacz during their men's singles match at the Shanghai Masters tennis tournament in Shanghai on October 9, 2026. (Photo by Hector RETAMAL / AFP via Getty Images)

Serbia's Novak Djokovic prepares between points during his match against Poland's Hubert Hurkacz during their men's singles match at the Shanghai Masters tennis tournament in Shanghai on October 9, 2026. (Photo by Hector RETAMAL / AFP via Getty Images)

Serbia's Novak Djokovic hits a return to Poland's Hubert Hurkacz during their men's singles match at the Shanghai Masters tennis tournament in Shanghai on October 9, 2026. (Photo by Hector RETAMAL / AFP via Getty Images)