1891 U.S. National Championships – Women's singles

Women's singles
1891 U.S. National Championships
Champion	Mabel Cahill[1]
Runner-up	Ellen Roosevelt[1]
Final score	6–4, 6–1, 4–6, 6–3
Details
Draw	8(+CR)
Seeds	–
Events
Singles men women Doubles
← 1890 · U.S. National Championships · 1892 →

Mabel Cahill won the singles tennis title by defeating reigning champion Ellen Roosevelt 6–4, 6–1, 4–6, 6–3 in the Challenge Round of the 1891 U.S. Women's National Singles Championship. Cahill had won the right to challenge Ellen Roosevelt by defeating her sister Grace Roosevelt 6–3, 7–5 in the final of the All Comers' competition. The event was played on outdoor grass courts and held at the Philadelphia Cricket Club in Chestnut Hill, Philadelphia from June 23 through June 27, 1891.^[1]

The event is notable for its change from a best-of-three to a best-of-five format in the final round, a format that continued until 1901, excluding 1893. This was, and still is, unusual for a women's tournament, and was the only stretch of time where a best-of-five format was played at a women's grand slam event.^[2]

Draw[]

Challenge round[]

	Challenge Round
	Ellen Roosevelt		4	1	6	3
	Mabel Cahill		6	6	4	6

All Comers' finals[]

	Preliminary Round							First round							Semifinals							Final
										6	6
									Emma Leavitt Morgan	0	0
																	1	1
																Grace Roosevelt	6	6
									Grace Roosevelt	3	6	6
			5	6	6					6	3	4
			6	5	1																		Grace Roosevelt	3	5
																							Mabel Cahill	6	7
									Mabel Cahill	6	6
										5	4
																Mabel Cahill	6	6
																Lida Voorhees	1	0
									Lida Voorhees	4	6	6
									Amy Williams	6	3	3

References[]