Harold Nisbet
Harold Adair Nisbet was a British lawn tennis player who was active at the end of the 19th century and beginning of the 20th century.
During his career he reached four doubles finals at the Wimbledon Championships as well as the doubles final at the U.S. National Championships in 1897. In singles, Nisbet reached the all-comers final of the U.S. National Championships in 1897 and the semifinals of Wimbledon in 1896 and 1900.
Grand Slam finals
Singles (1 final)
All-Comers
Doubles (5 runner-ups)
| Result | Year | Championship | Surface | Partner | Opponents | Score |
| Loss | 1896 | Wimbledon | Grass |  Reginald Doherty | Wilfred Baddeley Herbert Baddeley | 6–1, 6–3, 4–6, 2–6, 1–6 |
| Loss | 1897 | U.S. Championships | Grass | Harold Mahony |  Leo Ware George Sheldon | 13–11, 2–6, 7–9, 6–1, 1–6 |
| Loss | 1898 | Wimbledon | Grass | Clarence Hobart |  Reginald Doherty Laurence Doherty | 4–6, 4–6, 2–6 |
| Loss | 1899 | Wimbledon | Grass | Clarence Hobart | Reginald Doherty Laurence Doherty | 5–7, 0–6, 2–6 |
| Loss | 1900 | Wimbledon | Grass | Herbert Roper Barrett | Reginald Doherty Laurence Doherty | 7–9, 5–7, 6–4, 6–3, 3–6 |