| Full name | Harold Humphrey Hackett |
|---|---|
| Country (sports) |  United States |
| Born | July 12, 1878 Hingham, MA, United States |
| Died | November 20, 1937 (aged 59) New York, NY, United States |
| Plays | Right-handed (1-handed backhand) |
| Int. Tennis HoF | 1961 (member page) |
| Singles | |
| Highest ranking | No. 7 (1906 U.S. ranking)[1] |
| Grand Slam singles results | |
| US Open | QF (1906) |
| Doubles | |
| Grand Slam doubles results | |
| US Open | W (1907, 1908, 1909, 1910) |
Harold Humphrey Hackett (July 12, 1878 – November 20, 1937) was an American tennis player.
- ^ United States Lawn Tennis Association (1972). Official Encyclopedia of Tennis (First Edition), p. 409.