| Champ: |  Stan Smith |
| Runner: | Robert Lutz |
| Score: | 7–6(7–2), 7–6(7–5), 4–6, 6–4 |
| Draw: | 32 |
| Seeds: | 12 |
| Type: | singles doubles |
See main article: 1973 U.S. Professional Indoor. 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.