BEIJING, CHINA - OCTOBER 04: Alexander Zverev of Germany reacts during the Men's Singles quarterfinal match against Novak Djokovic of Serbia on day five of China Open at the National Tennis Center on October 04, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - OCTOBER 04: Alexander Zverev of Germany reacts during the Men's Singles quarterfinal match against Novak Djokovic of Serbia on day five of China Open at the National Tennis Center on October 04, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - OCTOBER 04: Alexander Zverev of Germany reacts during the Men's Singles quarterfinal match against Novak Djokovic of Serbia on day five of China Open at the National Tennis Center on October 04, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - OCTOBER 04: Alexander Zverev of Germany reacts during the Men's Singles quarterfinal match against Novak Djokovic of Serbia on day five of China Open at the National Tennis Center on October 04, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - OCTOBER 04: Alexander Zverev of Germany reacts during the Men's Singles quarterfinal match against Novak Djokovic of Serbia on day five of China Open at the National Tennis Center on October 04, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - OCTOBER 04: Alexander Zverev of Germany reacts during the Men's Singles quarterfinal match against Novak Djokovic of Serbia on day five of China Open at the National Tennis Center on October 04, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - OCTOBER 04: Alexander Zverev of Germany reacts during the Men's Singles quarterfinal match against Novak Djokovic of Serbia on day five of China Open at the National Tennis Center on October 04, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - OCTOBER 04: Alexander Zverev of Germany returns a shot against Novak Djokovic of Serbia during the Men's Singles quarterfinal match on day five of China Open at the National Tennis Center on October 04, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)