List of Champions of the 1889 U.S. National Championships (now known as the US Open):
Henry Slocum defeated Quincy Shaw 6-3, 6-1, 4-6, 6-2
Bertha Townsend defeated Lida Voorhees 7-5, 6-2
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| Preceded by 1888 U.S. National Championships |
U.S. National Championships | Succeeded by 1890 U.S. National Championships |
| Preceded by 1889 Wimbledon Championships |
Grand Slams | Succeeded by 1890 Wimbledon Championships |