TOKYO, JAPAN - OCTOBER 01: Carlos Alcaraz of Spain plays a forehand against Alex Michelsen of United States during their Men's singles match on day two of Kinoshita Group Japan Open at Ariake Tennis Park on October 01, 2026 in Tokyo, Japan. (Photo by Kenta Harada/Getty Images)

TOKYO, JAPAN - OCTOBER 01: Alex Michelsen of United States celebrates a point against Carlos Alcaraz of Spain during their singles match on day two of Kinoshita Group Japan Open at Ariake Tennis Park on October 01, 2026 in Tokyo, Japan. (Photo by Kenta Harada/Getty Images)

TOKYO, JAPAN - OCTOBER 01: Kei Nishikori of Japan leaves the court after a ceremony for his retirement on day two of Kinoshita Group Japan Open at Ariake Tennis Park on October 01, 2026 in Tokyo, Japan. (Photo by Kenta Harada/Getty Images)

TOKYO, JAPAN - OCTOBER 01: Kei Nishikori of Japan plays a forehand against Frances Tiafoe of United States during their singles match on day two of Kinoshita Group Japan Open at Ariake Tennis Park on October 01, 2026 in Tokyo, Japan. (Photo by Kenta Harada/Getty Images)

TOKYO, JAPAN - OCTOBER 01: Adolfo Daniel Vallejo of Paraguay plays a forehand against Rafael Jodar of Spain during their Men's singles match on day two of Kinoshita Group Japan Open at Ariake Tennis Park on October 01, 2026 in Tokyo, Japan. (Photo by Kenta Harada/Getty Images)

TOKYO, JAPAN - OCTOBER 01: Carlos Alcaraz of Spain celebrates a point against Alex Michelsen of United States during their Men's singles match on day two of Kinoshita Group Japan Open at Ariake Tennis Park on October 01, 2026 in Tokyo, Japan. (Photo by Kenta Harada/Getty Images)

TOKYO, JAPAN - OCTOBER 01: Frances Tiafoe of United States (L) and Kei Nishikori of Japan pose for photographs prior to their Men's singles match on day two of Kinoshita Group Japan Open at Ariake Tennis Park on October 01, 2026 in Tokyo, Japan. (Photo by Kenta Harada/Getty Images)

TOKYO, JAPAN - OCTOBER 01: Carlos Alcaraz of Spain plays a forehand against Alex Michelsen of United States during their Men's singles match on day two of Kinoshita Group Japan Open at Ariake Tennis Park on October 01, 2026 in Tokyo, Japan. (Photo by Kenta Harada/Getty Images)