1991 US Open – Men's singles

Stefan Edberg defeated Jim Courier in the final, 6–2, 6–4, 6–0 to win the men's singles tennis title at the 1991 US Open. It was his first US Open singles title and fifth major singles title overall.

Pete Sampras was the defending champion, but lost in the quarterfinals to Courier.

Five-time champion Jimmy Connors, who turned 39 during the tournament, entered as a wildcard and impressively reached the semifinals before losing to Courier. Connors became the oldest male semifinalist at the tournament since Ken Rosewall in 1974.

Seeds
The seeded players are listed below. Stefan Edberg was the champion; others show the round in which they were eliminated.


 * 1) 🇩🇪 Boris Becker (third round)
 * 2) 🇸🇪 Stefan Edberg (champion)
 * 3) 🇩🇪 Michael Stich (quarterfinalist)
 * 4) 🇺🇸 Jim Courier (finalist)
 * 5)  Ivan Lendl (semifinalist)
 * 6) 🇺🇸 Pete Sampras (quarterfinalist)
 * 7) 🇫🇷 Guy Forget (second round)
 * 8) 🇺🇸 Andre Agassi (first round)
 * 9) 🇪🇸 Sergi Bruguera (second round)
 * 10)  Karel Nováček (third round)
 * 11) 🇺🇸 David Wheaton (fourth round)
 * 12) 🇭🇷 Goran Ivanišević (fourth round)
 * 13)  Andrei Cherkasov (first round)
 * 14) 🇪🇸 Emilio Sánchez (fourth round)
 * 15)  Petr Korda (first round)
 * 16) 🇺🇸 John McEnroe (third round)

Key

 * Q = Qualifier
 * WC = Wild card
 * r = Retired