The 1991 US Open was a tennis tournament played on outdoor hard courts at the USTA National Tennis Center in New York City in New York in the United States. It was the 111th edition of the US Open and was held from August 26 to September 8, 1991. US Open 1991: August 26 – September 8, 1991. Men's singles: Stefan Edberg — 5th major title. Women's singles: Monica Seles — 4th major title. Wiki link