Ivan Lendl defeated defending champion John McEnroe in a rematch of the previous year's final, 7–6(7–1), 6–3, 6–4 to win the men's singles tennis title at the 1985 US Open. It was his first US Open title, following three consecutive runner-up finishes at the tournament, and second major title overall.

This tournament marked the final major appearance of former world No. 1, 1972 US Open and 1973 French Open champion Ilie Năstase; he lost to Mike Bauer in the first round. It also marked the first US Open appearance of future world No. 1 and champion Boris Becker, who would win the title 4 years later; he lost to Joakim Nyström in the fourth round.

Seeds The seeded players are listed below. Ivan Lendl is the champion; others show the round in which they were eliminated.

John McEnroe (finalist) Ivan Lendl (champion) Mats Wilander (semifinalist) Jimmy Connors (semifinalist) Kevin Curren (first round) Anders Järryd (quarterfinalist) Yannick Noah (quarterfinalist) Boris Becker (fourth round) Miloslav Mečíř (second round) Joakim Nyström (quarterfinalist) Stefan Edberg (fourth round) Johan Kriek (second round) Tim Mayotte (fourth round) Henrik Sundström (first round) Scott Davis (second round) Tomáš Šmíd (fourth round)

Draw

Key Q = Qualifier WC = Wild card LL = Lucky loser r = Retired

Final eight

Section 1

Section 2

Section 3

Section 4

Section 5

Section 6

Section 7

Section 8

External links Association of Tennis Professionals (ATP) – 1985 US Open Men's Singles draw 1985 US Open – Men's draws and results at the International Tennis Federation