BEIJING, CHINA - SEPTEMBER 30: Novak Djokovic of Serbia reacts during the Men's Singles first round match against Nuno Borges of Portugal on day one of China Open at the National Tennis Center on September 30, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - SEPTEMBER 30: Novak Djokovic of Serbia reacts during the Men's Singles first round match against Nuno Borges of Portugal on day one of China Open at the National Tennis Center on September 30, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - SEPTEMBER 30: Novak Djokovic of Serbia returns a shot against Nuno Borges of Portugal during the Men's Singles first round match on day one of China Open at the National Tennis Center on September 30, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - SEPTEMBER 30: Novak Djokovic of Serbia returns a shot against Nuno Borges of Portugal during the Men's Singles first round match on day one of China Open at the National Tennis Center on September 30, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - SEPTEMBER 30: Novak Djokovic of Serbia returns a shot against Nuno Borges of Portugal during the Men's Singles first round match on day one of China Open at the National Tennis Center on September 30, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

BEIJING, CHINA - SEPTEMBER 30: Novak Djokovic of Serbia returns a shot against Nuno Borges of Portugal during the Men's Singles first round match on day one of China Open at the National Tennis Center on September 30, 2026 in Beijing, China. (Photo by Emmanuel Wong/Getty Images)

People stand outside the Diamond Stadium of the National Tennis Centre during the China Open tennis tournament in Beijing on September 30, 2026. (Photo by Pedro PARDO / AFP via Getty Images)

People walk past the Diamond Stadium of the National Tennis Centre during the China Open tennis tournament in Beijing on September 30, 2026. (Photo by Pedro PARDO / AFP via Getty Images)