BEIJING, CHINA - OCTOBER 08: Nikola Bartunkova of Czech Republic returns a shot against Karolina Muchova of Czech Republic during the Women's Singles quarterfinals match on day nine of China Open at the National Tennis Center on October 08, 2026 in Beijing, China. (Photo by Yanshan Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 08: Karolina Muchova of Czech Republic leaves the court after the Women's Singles quarterfinals match against Nikola Bartunkova of Czech Republic on day nine of China Open at the National Tennis Center on October 08, 2026 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 08: Karolina Muchova of Czech Republic leaves the court after the Women's Singles quarterfinals match against Nikola Bartunkova of Czech Republic on day nine of China Open at the National Tennis Center on October 08, 2026 in Beijing, China. (Photo by Yanshan Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 08: Karolina Muchova of Czech Republic leaves the court after the Women's Singles quarterfinals match against Nikola Bartunkova of Czech Republic on day nine of China Open at the National Tennis Center on October 08, 2026 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 08: Nikola Bartunkova of Czech Republic celebrates after winning the Women's Singles quarterfinals match against Karolina Muchova of Czech Republic on day nine of China Open at the National Tennis Center on October 08, 2026 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 08: Nikola Bartunkova of Czech Republic celebrates after winning the Women's Singles quarterfinals match against Karolina Muchova of Czech Republic on day nine of China Open at the National Tennis Center on October 08, 2026 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 08: Nikola Bartunkova of Czech Republic celebrates after winning the Women's Singles quarterfinals match against Karolina Muchova of Czech Republic on day nine of China Open at the National Tennis Center on October 08, 2026 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

BEIJING, CHINA - OCTOBER 08: Nikola Bartunkova of Czech Republic celebrates after winning the Women's Singles quarterfinals match against Karolina Muchova of Czech Republic on day nine of China Open at the National Tennis Center on October 08, 2026 in Beijing, China. (Photo by Lintao Zhang/Getty Images)