TOKYO, JAPAN - OCTOBER 01: (L-R) Ai Sugiyama , Shingo Kunieda , Kei Nishikori , Go Soeda of Japan National team manager and Kimiko Date pose for photographs at a retirement ceremony for Kei Nishikori 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 celebrates a point 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: 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: Alex Michelsen of United States is seen 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 celebrates a point 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: Taylor Fritz of United States plays a forehand against Jaume Munar of Spain during their Men's singles match day one 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 reacts against Kei Nishikori of Japan 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: Taylor Fritz of United States serves against Jaume Munar of Spain during their Men's singles match day one 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)