1998 US Open – Men's singles

Defending champion Patrick Rafter defeated Mark Philippoussis in the final, 6–3, 3–6, 6–2, 6–0 to win the men's singles tennis title at the 1998 US Open. It was his second (and last) major singles title.

Seeds
• # 🇺🇸 Pete Sampras (semifinals)

• # 🇨🇱 Marcelo Ríos (third round)

• # 🇦🇺 Patrick Rafter (champion)

• # 🇨🇿 Petr Korda (first round)

• # 🇳🇱 Richard Krajicek (third round)

• # 🇬🇧 Greg Rusedski (third round)

• # 🇪🇸 Àlex Corretja (fourth round)

• # 🇺🇸 Andre Agassi (fourth round)

• # 🇸🇰 Karol Kučera (quarterfinals)

• # 🇪🇸 Carlos Moyà (semifinals)

• # 🇷🇺 Yevgeny Kafelnikov (fourth round)

• # 🇸🇪 Jonas Björkman (quarterfinals)

• # 🇬🇧 Tim Henman (fourth round)

• # 🇭🇷 Goran Ivanišević (fourth round)

• # 🇪🇸 Alberto Berasategui (first round)

• # 🇪🇸 Albert Costa (first round)