SHANGHAI, CHINA - OCTOBER 04: Yunchaokete Bu of China returns a shot in the Men's singles 1st Round match against Alex Michelsen of the United States on Day 5 of 2024 Shanghai Rolex Masters at Qi Zhong Tennis Centre on October 04, 2024 in Shanghai, China. (Photo by Zhe Ji/Getty Images)

SHANGHAI, CHINA - OCTOBER 04: Yunchaokete Bu of China reacts in the Men's singles 1st Round match against Alex Michelsen of the United States on Day 5 of 2024 Shanghai Rolex Masters at Qi Zhong Tennis Centre on October 04, 2024 in Shanghai, China. (Photo by Zhe Ji/Getty Images)

SHANGHAI, CHINA - OCTOBER 04: Yunchaokete Bu of China reacts in the Men's singles 1st Round match against Alex Michelsen of the United States on Day 5 of 2024 Shanghai Rolex Masters at Qi Zhong Tennis Centre on October 04, 2024 in Shanghai, China. (Photo by Zhe Ji/Getty Images)

SHANGHAI, CHINA - OCTOBER 04: Yunchaokete Bu of China returns a shot in the Men's singles 1st Round match against Alex Michelsen of the United States on Day 5 of 2024 Shanghai Rolex Masters at Qi Zhong Tennis Centre on October 04, 2024 in Shanghai, China. (Photo by Zhe Ji/Getty Images)

SHANGHAI, CHINA - OCTOBER 04: Yunchaokete Bu of China returns a shot in the Men's singles 1st Round match against Alex Michelsen of the United States on Day 5 of 2024 Shanghai Rolex Masters at Qi Zhong Tennis Centre on October 04, 2024 in Shanghai, China. (Photo by Zhe Ji/Getty Images)

SHANGHAI, CHINA - OCTOBER 04: Yunchaokete Bu of China returns a shot in the Men's singles 1st Round match against Alex Michelsen of the United States on Day 5 of 2024 Shanghai Rolex Masters at Qi Zhong Tennis Centre on October 04, 2024 in Shanghai, China. (Photo by Zhe Ji/Getty Images)

SHANGHAI, CHINA - OCTOBER 04: Yunchaokete Bu of China returns a shot in the Men's singles 1st Round match against Alex Michelsen of the United States on Day 5 of 2024 Shanghai Rolex Masters at Qi Zhong Tennis Centre on October 04, 2024 in Shanghai, China. (Photo by Zhe Ji/Getty Images)

Greece's Stefanos Tsitsipas celebrates a point against Japan's Kei Nishikori during their men's singles match at the Shanghai Masters tennis tournament in Shanghai on October 4, 2024. (Photo by Hector RETAMAL / AFP) (Photo by HECTOR RETAMAL/AFP via Getty Images)