John Isner in action against Stefanos Tsitsipas on Friday in Cincinnati.

John Isner survives a third-set tie-break to advance past Benjamin Bonzi.

John Isner advances to his sixth Newport semi-final.

John Isner improves to 24-5 at Newport, where he is a four-time singles champion.

John Isner hits 36 aces to defeat Andy Murray on Centre Court Wednesday at Wimbledon.

John Isner has fired 90 aces in his opening two wins at Wimbledon this year.

John Isner battles back from two-sets-to-one down to advance at Wimbledon.

John Isner and Diego Schwartzman advance to the final at the Internazionali BNL d'Italia in Rome on Saturday.

John Isner and Diego Schwartzman complete a first-round comeback in a Match Tie-break.

John Isner and Hubert Hurkacz celebrate their win at the 2022 Miami Open presented by Itau.

John Isner and Hubert Hurkacz advance to the semi-finals at the Miami Open presented by Itau on Wednesday.

John Isner and Jack Sock lose just one set en route to their second Indian Wells doubles title together.

John Isner and Jack Sock lose just one set en route to their second Indian Wells doubles title together.

John Isner and Jack Sock celebrate reaching their second BNP Paribas Open championship match together in Indian Wells on Friday.

Jack Sock and John Isner celebrate reaching a second BNP Paribas Open semi-final together in Indian Wells on Wednesday.

Jack Sock (left) and John Isner win more than 70 per cent of both their first and second serve points to score an Indian Wells upset.

John Isner rallies from a break down in the third set to defeat Fernando Verdasco on Monday evening in Acapulco.

John Isner fires 19 aces to maintain his perfect record on serve at the Dallas Open.

Jack Sock (left) and John Isner recorded five love holds, including four in a row in the second set, to advance in Dallas.

John Isner does not face a break point in his second-round victory against Kevin Anderson on Wednesday in Dallas.

Team United States, captained by Michael Russell, is in Group C at the ATP Cup alongside Germany, Canada and Great Britain.

Team Europe and Team World gather in front of the Boston skyline at LoPresti Park on Wednesday ahead of the Laver Cup.

John Isner, Felix Auger-Aliassime, Denis Shapovalov, Diego Schwartzman, Nick Kyrgios and Reilly Opelka pose with Team World Captain John McEnroe.

John Isner visits the ‘Make Way for Ducklings’ statues, the well-known bronze ducks located in Boston Common.

John Isner reaches his first ATP Masters 1000 semi-final since 2019 after defeating Gael Monfil in Toronto.