Croatia's Marin Cilic hits a return to Japan's Kei Nishikori during their men's singles match at the Japan Open tennis tournament in Tokyo on September 26, 2024. (Photo by Yuichi YAMAZAKI / AFP) (Photo by YUICHI YAMAZAKI/AFP via Getty Images)

Japan's Kei Nishikori reacts after a point against Croatia's Marin Cilic during their men's singles match at the Japan Open tennis tournament in Tokyo on September 26, 2024. (Photo by Yuichi YAMAZAKI / AFP) (Photo by YUICHI YAMAZAKI/AFP via Getty Images)

Japan's Kei Nishikori reacts after a point against Croatia's Marin Cilic during their men's singles match at the Japan Open tennis tournament in Tokyo on September 26, 2024. (Photo by Yuichi YAMAZAKI / AFP) (Photo by YUICHI YAMAZAKI/AFP via Getty Images)

Japan's Kei Nishikori hits a return to Croatia's Marin Cilic during their men's singles match at the Japan Open tennis tournament in Tokyo on September 26, 2024. (Photo by Yuichi YAMAZAKI / AFP) (Photo by YUICHI YAMAZAKI/AFP via Getty Images)

Japan's Kei Nishikori serves to Croatia's Marin Cilic during their men's singles match at the Japan Open tennis tournament in Tokyo on September 26, 2024. (Photo by Yuichi YAMAZAKI / AFP) (Photo by YUICHI YAMAZAKI/AFP via Getty Images)

BEIJING, CHINA - SEPTEMBER 26: Ashlyn Krueger of the United States reacts in the Women's Singles First Round against Yafan Wang of China during day four of the 2024 China Open at National Tennis Center on September 26, 2024 in Beijing, China. (Photo by Shi Tang/Getty Images)

BEIJING, CHINA - SEPTEMBER 26: Yafan Wang of China plays a forehand in the Women's Singles First Round against Ashlyn Krueger of the United State during day four of the 2024 China Open at National Tennis Center on September 26, 2024 in Beijing, China. (Photo by Shi Tang/Getty Images)

BEIJING, CHINA - SEPTEMBER 26: Yafan Wang of China plays a forehand in the Women's Singles First Round against Ashlyn Krueger of the United State during day four of the 2024 China Open at National Tennis Center on September 26, 2024 in Beijing, China. (Photo by Shi Tang/Getty Images)