1991 OTB International Open
The 1991 OTB International Open was a tennis tournament played on outdoor hard courts that was part of the World Series of the 1991 ATP Tour. It was played at Schenectady, New York in the United States from August 19 through August 26, 1991.
Champions
Men's Singles
Michael Stich defeated 
Emilio Sánchez 6–2, 6–4
- It was Stich's 4th title of the year and the 9th of his career.
Men's Doubles
Javier Sánchez / 
Todd Woodbridge defeated 
Andrés Gómez / Emilio Sánchez 3–6, 7–6, 7–6
- It was Sánchez's 3rd title of the year and the 16th of his career. It was Woodbridge's 5th title of the year and the 7th of his career.