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Tennis: Kei Nishikori

A woman holds copies of an extra edition of a newspaper handed out in Matsue in Shimane Prefecture, western Japan, after Japanese tennis icon and former world No. 4 Kei Nishikori, who hails from the town, said on social media he will retire at the end of the season.

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Tennis: Kei Nishikori

A woman holds copies of an extra edition of a newspaper handed out in Matsue in Shimane Prefecture, western Japan, after Japanese tennis icon and former world No. 4 Kei Nishikori, who hails from the town, said on social media he will retire at the end of the season.

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Tennis: Kei Nishikori

Photo taken on Aug. 14, 2016, shows Japan's Kei Nishikori holding his bronze medal during the awards ceremony for the men's singles at the Rio de Janeiro Olympics. On April 30, 2026, the Japanese tennis icon and former world No. 4 said on social media that he will retire at the end of the season.

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Tennis: Kei Nishikori

Photo taken in Melbourne on Jan. 13, 2026, shows Japan's Kei Nishikori practicing ahead of an Australian Open men's singles qualifier. On April 30, 2026, the Japanese tennis icon and former world No. 4 said on social media that he will retire at the end of the season.

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Tennis: Kei Nishikori

Photo taken on Sept. 8, 2014, shows Japan's Kei Nishikori in action against Marin Cilic of Croatia in their U.S. Open final in New York. On April 30, 2026, the Japanese tennis icon and former world No. 4 said on social media that he will retire at the end of the season.

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Tennis: Kei Nishikori

Photo taken on July 10, 2019, shows Japan's Kei Nishikori in action against Roger Federer of Switzerland in their Wimbledon quarterfinal in London. On April 30, 2026, the Japanese tennis icon and former world No. 4 said on social media that he will retire at the end of the season.

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Tennis: Nishikori

Japan's former world No. 4 Kei Nishikori meets the press in Bradenton, Florida, on April 7, 2026, after beating Nicolas Kicker of Argentina in the men's singles round of 32 at the Elizabeth Moore Sarasota Open tennis tournament.

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2026 AVN Awards Nominations Party - LA

Kasey Kei arrives at the 2026 AVN Awards Nominations Party held at AVALON Hollywood and Bardot on November 20, 2025 in Hollywood, Los Angeles, CA, USA. (Photo by Xavier Collin/Image Press Agency/ABACAPRESS.COM)

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Tennis: Nishikori

Former world No. 4 Kei Nishikori of Japan plays against compatriot Kaichi Uchida in the quarterfinals of the men's singles at the Yokohama Keio Challenger tennis tournament in Yokohama, near Tokyo, on Nov. 21, 2025. Nishikori returned to competition after a hiatus of about three months due to a back injury.

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Tennis: Nishikori

Former world No. 4 Kei Nishikori of Japan plays against compatriot Kaichi Uchida in the quarterfinals of the men's singles at the Yokohama Keio Challenger tennis tournament in Yokohama, near Tokyo, on Nov. 21, 2025. Nishikori returned to competition after a hiatus of about three months due to a back injury.

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Tennis: Nishikori

Former world No. 4 Kei Nishikori of Japan plays against compatriot Kaichi Uchida in the quarterfinals of the men's singles at the Yokohama Keio Challenger tennis tournament in Yokohama, near Tokyo, on Nov. 21, 2025. Nishikori returned to competition after a hiatus of about three months due to a back injury.

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Tennis: Nishikori

Former world No. 4 Kei Nishikori of Japan plays against South Korea's Shin San Hui in the second round of the men's singles at the Yokohama Keio Challenger tennis tournament in Yokohama, near Tokyo, on Nov. 20, 2025. Nishikori returned to competition after a hiatus of about three months due to a back injury.

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Tennis: Nishikori

Former world No. 4 Kei Nishikori of Japan plays against South Korea's Shin San Hui in the second round of the men's singles at the Yokohama Keio Challenger tennis tournament in Yokohama, near Tokyo, on Nov. 20, 2025. Nishikori returned to competition after a hiatus of about three months due to a back injury.

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Tennis: Nishikori returns to competition

Former world No. 4 Kei Nishikori of Japan plays against compatriot Taisei Ichikawa in the first round of the men's singles at the Yokohama Keio Challenger tennis tournament in Yokohama, near Tokyo, on Nov. 18, 2025, returning to competition after a hiatus of about three months due to a back injury.

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Tennis: Nishikori returns to competition

Former world No. 4 Kei Nishikori of Japan plays against compatriot Taisei Ichikawa in the first round of the men's singles at the Yokohama Keio Challenger tennis tournament in Yokohama, near Tokyo, on Nov. 18, 2025, returning to competition after a hiatus of about three months due to a back injury.

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Tennis: Nishikori returns to competition

Former world No. 4 Kei Nishikori of Japan plays against compatriot Taisei Ichikawa in the first round of the men's singles at the Yokohama Keio Challenger tennis tournament in Yokohama, near Tokyo, on Nov. 18, 2025, returning to competition after a hiatus of about three months due to a back injury.

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Tennis: Nishikori returns to competition

Former world No. 4 Kei Nishikori of Japan plays against compatriot Taisei Ichikawa in the first round of the men's singles at the Yokohama Keio Challenger tennis tournament in Yokohama, near Tokyo, on Nov. 18, 2025, returning to competition after a hiatus of about three months due to a back injury.

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