| Henry Slocum | |
| Fullname: | Henry Warner Slocum, Jr. |
| Birth Date: | 28 May 1862 |
| Birth Place: | Syracuse, New York, United States |
| Death Place: | Manhattan, New York City, United States |
| Turnedpro: | 1884 (amateur tour) |
| Retired: | 1913 |
| Plays: | Right-handed (one-handed backhand) |
| Tennishofyear: | 1955 |
| Tennishofid: | henry-slocum |
| Singlesrecord: | 112-57 (66.2%)[1] |
| Singlestitles: | 9 |
| Highestsinglesranking: | No. 8 (1888, ITHF)[2] |
| Usopenresult: | W (1888, 1889) |
| Usopendoublesresult: | W (1889) |
Henry Warner Slocum, Jr. (May 28, 1862 – January 22, 1949) was an American male tennis player who was active in the late 19th century.
He was born on May 28, 1862, in Syracuse, New York, to Henry Warner Slocum.
Slocum graduated from Yale University in 1883 and started playing tennis in 1884 although he entered few prominent tournaments until the spring of 1886.[3] Slocum won the 1888 Men's Singles title at the U.S. National Championships' in Newport against defending champion and compatriot Howard Taylor in straight sets. The next year he successfully defended his title in the Challenge Round with a victory over Quincy Shaw.[4]
His other career highlights include winning the Rockaway Hunting Club Invitation three times (1886–1888), the Wentworth Open Tournament at Wentworth, New Hampshire (1887), the Staten Island Invitation (1887).
He was president of the United States National Lawn Tennis Association (USNLTA) in 1892 and 1893.
He died on January 22, 1949, at St. Luke's Hospital in Manhattan, New York City.[5]
Slocum was inducted into the International Tennis Hall of Fame in 1955. In 1890 he published a book titled Lawn Tennis in Our Own Country.
| Result | Year | Championship | Surface | Opponent | Score | |
|---|---|---|---|---|---|---|
| Loss | 1887 | Grass |  Richard Sears | 1–6, 3–6, 2–6 | ||
| Win | 1888 | Grass | Howard Taylor | 6–4, 6–1, 6–0 | ||
| Win | 1889 | Grass | Quincy Shaw | 6–3, 6–1, 4–6, 6–2 | ||
| Loss | 1890 | Grass | Oliver Campbell | 2–6, 6–4, 3–6, 1–6 |
| Result | Year | Championship | Surface | Partner | Opponents | Score | |
|---|---|---|---|---|---|---|---|
| Loss | 1885 | Grass | 3–6, 0–6, 2–6 | ||||
| Loss | 1887 | Grass | 4–6, 6–3, 6–2, 3–6, 3–6 | ||||
| Win | 1889 | Grass | 14–12, 10–8, 6–4 |