# 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)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final | Final |
| | Nikola Pilić | 4 | 4 | 7 | 3 | | | | | | |
| 7 | Robert Lutz | 6 | 6 | 5 | 6 | | | | | | |
| 7 | Robert Lutz | 6 | 6 | 5 | 6 | 7 | Robert Lutz | 6$^2$ | 6$^5$ | 6 | 4 |
| | | | | | | 3 | Stan Smith | 7$^7$ | 7$^7$ | 4 | 6 |
| 3 | Stan Smith | 6 | 6 | 6 | | 3 | Stan Smith | 7$^7$ | 7$^7$ | 4 | 6 |
| | Robert Maud | 1 | 3 | 4 | | | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 2 | C Dibley | 6 | 3 | 6 | | | | | | | | | | | | | | | | |
| | T Addison | 3 | 6 | 3 | 2 | C Dibley | 6$^6$ | 6 | 6 | | | | | | | | | | | |
| | F McMillan | w/o | | | | F McMillan | 7$^8$ | 1 | 1 | | | | | | | | | | | |
| | C Drysdale | | | | | | | | | 2 | C Dibley | 7$^7$ | 2 | 6$^1$ | | | | | | |
| 6 | R Emerson | 6 | 6 | | | | | | | | N Pilić | 6$^2$ | 6 | 7$^7$ | | | | | | |
| | JE Mandarino | 4 | 0 | | 6 | R Emerson | 6$^3$ | 6$^6$ | | | | | | | | | | | | |
| | B Phillips-Moore | 1 | 3 | | | N Pilić | 7$^7$ | 7$^8$ | | | | | | | | | | | | |
| | N Pilić | 6 | 6 | | | | | | | | | | | | | N Pilić | 4 | 4 | 7 | 3 |
| 4 | D Stockton | 7$^7$ | 6 | | | | | | | | | | | | 7 | R Lutz | 6 | 6 | 5 | 6 |
| | G Battrick | 6$^3$ | 4 | | 4 | D Stockton | 6 | 6 | | | | | | | | | | | | |
| | M Holeček | 5 | 4 | | 11 | H Solomon | 3 | 2 | | | | | | | | | | | | |
| 11 | H Solomon | 7 | 6 | | | | | | | 4 | D Stockton | 6 | 6$^3$ | 2 | | | | | | |
| 7 | R Lutz | 7$^7$ | 6 | | | | | | | 7 | R Lutz | 4 | 7$^7$ | 6 | | | | | | |
| | B Gottfried | 6$^2$ | 3 | | 7 | R Lutz | 6 | 4 | 6 | | | | | | | | | | | |
| | O Parun | 6 | 1 | 7$^8$ | | O Parun | 4 | 6 | 4 | | | | | | | | | | | |
| 9 | A Stone | 3 | 6 | 6$^6$ | | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 12 | T Edlefsen | 6$^1$ | 7 | 6$^8$ | | | | | | | | | | | | | | | |
| | J Fillol | 7$^7$ | 5 | 7$^{10}$ | | J Fillol | 6 | 6$^5$ | 4 | | | | | | | | | | |
| | P Cornejo | 4 | 0 | | 8 | C Richey | 3 | 7$^7$ | 6 | | | | | | | | | | |
| 8 | C Richey | 6 | 6 | | | | | | | 8 | C Richey | 0 | 3 | | | | | | |
| 10 | P Dent | 7$^7$ | 6 | | | | | | | 3 | S Smith | 6 | 6 | | | | | | |
| | J McManus | 6$^3$ | 3 | | 10 | P Dent | 3 | 3 | | | | | | | | | | | |
| | R Barth | 2 | 4 | | 3 | S Smith | 6 | 6 | | | | | | | | | | | |
| 3 | S Smith | 6 | 6 | | | | | | | | | | | | 3 | S Smith | 6 | 6 | 6 |
| | A Pattison | w/o | | | | | | | | | | | | | | R Maud | 1 | 3 | 4 |
| | B Hewitt | | | | | A Pattison | 2 | 3 | | | | | | | | | | | |
| | R Maud | 7$^7$ | 4 | 6 | | R Maud | 6 | 6 | | | | | | | | | | | |
| 5 | J Alexander | 6$^4$ | 6 | 1 | | | | | | | R Maud | 6 | 4 | 7$^8$ | | | | | |
| | C Pasarell | 7$^7$ | 6 | | | | | | | 1 | R Laver | 4 | 6 | 6$^6$ | | | | | |
| | F Froehling | 6$^2$ | 2 | | | C Pasarell | 7 | 4 | 3 | | | | | | | | | | |
| | ON Bengtson | 5 | 1 | | 1 | R Laver | 5 | 6 | 6 | | | | | | | | | | |
| 1 | R Laver | 7 | 6 | | | | | | | | | | | | | | | | |