The Delaware Field Club Open also known as the Delaware Field Club Lawn Tennis Tournament was an American 19th century tennis competition founded in 1887. The tournament was usually held in early Autumn. The event was played at the Delaware Field Club, Wilmington, Delaware, United States and was discontinued in 1889.

History In 1885 the Delaware Field Club was founded. The club first staged the first Delaware Field Club Open in September 1886 the event was played on clay courts. The tournament was discontinued in 1889.

Finals Men's singles (Incomplete roll) YearChampionsRunners-upScore1887 Charles Belmont Davis Marmaduke Smith6–3, 6–4, 6–2.1888 Gustavus Remak jr Charles T. Lee2–6, 6–3, 6–3, 9–7.

Women's singles (Incomplete roll) YearChampionsRunners-upScore1887 Bertha Townsend Ellen Hansell6–4, 6–41888 Florence Bayard Katharine Pyle6–3, 6–0

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