1991 Manchester Open – Singles

Goran Ivanišević defeated Pete Sampras 6–4, 6–4 in the final to secure the title.

Seeds

 * 1) 🇺🇸 Pete Sampras (final)
 * 2)  Goran Ivanišević (champion)
 * 3) 🇺🇸 John McEnroe (first round)
 * 4) 🇺🇸 Brad Gilbert (first round)
 * 5)  Goran Prpić (first round)
 * 6)  Alexander Volkov (second round)
 * 7) 🇺🇸 Derrick Rostagno (second round)
 * 8) 🇦🇹 Horst Skoff (first round)