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John Isner announces plans to retire following 2023 US Open - Official Site of the 2023 US Open Tennis Championships - A USTA Event
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John Isner to Retire After 2023 U.S. Open; American Has Most Aces in Tennis History | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
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John Isner withdraws from 2022 US Open with wrist injury - Official Site of the 2023 US Open Tennis Championships - A USTA Event
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US teen Alex Michelsen topples John Isner to reach first ATP final at Newport | Tennis News - Times of India
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