1973 U.S. Professional Indoor – Singles

Rod Laver was the defending champion, but lost in the quarterfinals this year.

Stan Smith won the title, defeating Robert Lutz 7–6(7–2), 7–6(7–5), 4–6, 6–4 in the final.

Seeds
• # 🇦🇺 Rod Laver (quarterfinals)

• # 🇦🇺 Colin Dibley (quarterfinals)

• # 🇺🇸 Stan Smith (champion)

• # 🇺🇸 Dick Stockton (quarterfinals)

• # 🇦🇺 John Alexander (first round)

• # 🇦🇺 Roy Emerson (second round)

• # 🇺🇸 Robert Lutz (final)

• # 🇺🇸 Cliff Richey (quarterfinals)

• # 🇦🇺 Allan Stone (first round)

• # 🇦🇺 Phil Dent (second round)

• # 🇺🇸 Harold Solomon (second round)

• # 🇺🇸 Tom Edlefsen (first round)