This is a list of main career statistics of American professional tennis player John Isner. All statistics are according to the ATP Tour and ITF website. Performance timelines Singles Current through the 2023 Mexican Open. Doubles * not held due to COVID-19 pandemic. Significant finals Masters 1000 finals Singles: 5 (1 title, 4 runner-ups) Doubles: 8 (5 titles, 3 runner-ups) ATP career finals Singles: 31 (16 titles, 15 runner-ups) Doubles: 14 (8 titles, 6 runner-ups) Other finals Team competition: 2 (1 title, 1 runner-up) Record against top 10 players Isner's match record against players who have been ranked world No. 10 or higher, with those who are active in boldface. Top 10 wins Isner has a record against players who were, at the time the match was played, ranked in the top 10. See also List of ATP Tour top-level tournament singles champions List of Tennis Masters Series doubles champions Longest tennis match records Longest tiebreaker in tennis United States Davis Cup team List of United States Davis Cup team representatives Fastest recorded tennis serves References External links Isner, John