Henry Slocum (tennis)
Henry Warner Slocum, Jr. was an American male tennis player who was active in the late 19th century.
Biography
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. 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.
He was president of the United States National Lawn Tennis Association in 1892 and 1893.
He died on January 22, 1949 at St. Luke's Hospital in Manhattan, New York City.
Legacy
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.Grand Slam finals
Singles (2 titles, 2 runners-up)
| Result | Year | Championship | Surface | Opponent | Score |
| Loss | 1887 | U.S. Championships | Grass |  Richard Sears | 1–6, 3–6, 2–6 |
| Win | 1888 | U.S. Championships | Grass | Howard Taylor | 6–4, 6–1, 6–0 |
| Win | 1889 | U.S. Championships | Grass | Quincy Shaw | 6–3, 6–1, 4–6, 6–2 |
| Loss | 1890 | U.S. Championships | Grass | Oliver Campbell | 2–6, 6–4, 3–6, 1–6 |
Doubles (1 title, 2 runners-up)
| Result | Year | Championship | Surface | Partner | Opponents | Score |
| Loss | 1885 | U.S. Championships | Grass |  Percy Knapp | Joseph Clark Richard Sears | 3–6, 0–6, 2–6 |
| Loss | 1887 | U.S. Championships | Grass | Howard Taylor | James Dwight Richard Sears | 4–6, 6–3, 6–2, 3–6, 3–6 |
| Win | 1889 | U.S. Championships | Grass | Howard Taylor | Valentine Hall Oliver Campbell | 14–12, 10–8, 6–4 |