1974 U.S. Clay Court Championships – Men's singles

The 1974 U.S. Clay Court Championships – Men's singles was an event of the 1974 U.S. Clay Court Championships tennis tournament and was played on outdoor clay courts in Indianapolis, Indiana in the United States from August 5 through August 12, 1974. The draw comprised 64 players and 12 of them were seeded. Fourth-seeded Manuel Orantes was the defending champion U.S. Clay Court Championships singles champion but lost in the semifinals to Jimmy Connors. First-seeded Jimmy Connors won the title and $16,000 first-prize money by defeating third-seeded Björn Borg in the final, 5–7, 6–3, 6–4. It was their first encounter on clay courts.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. • #🇺🇸 Jimmy Connors (champion)

• #🇷🇴 Ilie Năstase (quarterfinals)

• #🇸🇪 Björn Borg (final)

• #🇪🇸 Manuel Orantes (semifinals)

• #🇲🇽 Raúl Ramírez (semifinals)

• #🇦🇷 Guillermo Vilas (quarterfinals)

• #🇺🇸 Brian Gottfried (quarterfinals)

• #🇳🇿 Onny Parun (quarterfinals)

• # Jürgen Fassbender (second round)

• # Hans-Jürgen Pohmann (third round)

• # Karl Meiler (second round)

• #🇪🇸 Juan Gisbert (third round)