# 1972 National Indoor Championships – Singles

The 1972 National Indoor Championships – Singles was an event of the 1972 National Indoor Championships tennis tournament held at the Hampton Roads Coliseum in Hampton, Virginia in the United States from February 28 through March 5, 1972. Ilie Năstase was the defending champion. Stan Smith won the singles title, defeating Ilie Năstase 6–3, 6–2, 6–7$^{(3–5)}$, 6–4 in the final.

## 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 | Final | Final | Final | Final | Final |
| Stan Smith | 7 | 6 | | | | | | |
| Andrés Gimeno | 6 | 2 | | | | | | |
| Andrés Gimeno | 6 | 2 | | Stan Smith | 6 | 6 | 6 | 6 |
| | | | | Ilie Năstase | 3 | 2 | 7 | 4 |
| Cliff Richey | 6 | 0 | 2 | Ilie Năstase | 3 | 2 | 7 | 4 |
| Ilie Năstase | 3 | 6 | 6 | | | | | |

### Top half

| First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| Stan Smith | 7 | 6 | | | | | | | | | | | | |
| Péter Szőke | 5 | 3 | | Stan Smith | 7 | 6 | | | | | | | | |
| Tom Gorman | 6 | 3 | 6 | Tom Gorman | 5 | 0 | | | | | | | | |
| Ion Țiriac | 3 | 6 | 3 | | | | | Stan Smith | 4 | 6 | 6 | | | |
| Vladimír Zedník | 6 | 6 | | | | | | Juan Gisbert Sr. | 6 | 2 | 1 | | | |
| David Lloyd | 3 | 1 | | Vladimír Zedník | 1 | 3 | | | | | | | | |
| Juan Gisbert Sr. | 7 | 7 | | Juan Gisbert Sr. | 6 | 6 | | | | | | | | |
| Gerald Battrick | 6 | 5 | | | | | | | | | | Stan Smith | 7 | 6 |
| Jimmy Connors | 6 | 6 | | | | | | | | | | Andrés Gimeno | 6 | 2 |
| Ove Bengtson | 4 | 4 | | Jimmy Connors | 6 | 6 | | | | | | | | |
| Jaime Fillol | 6 | 6 | | Jaime Fillol | 1 | 2 | | | | | | | | |
| Hans Kary | 0 | 3 | | | | | | Jimmy Connors | 3 | 6 | | | | |
| Ross Case | 5 | 1 | | | | | | Andrés Gimeno | 6 | 7 | | | | |
| Thomaz Koch | 7 | 6 | | Thomaz Koch | 7 | 1 | 5 | | | | | | | |
| Tenny Svensson | 0 | 2 | | Andrés Gimeno | 6 | 6 | 7 | | | | | | | |
| Andrés Gimeno | 6 | 6 | | | | | | | | | | | | |

### Bottom half

| First Round | First Round | First Round | First Round | Second Round | Second Round | Second Round | Second Round | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| Cliff Richey | 6 | 6 | | | | | | | | | | | | |
| James Parker | 1 | 2 | | Cliff Richey | 6 | 6 | | | | | | | | |
| Manuel Orantes | 7 | 7 | | Manuel Orantes | 4 | 4 | | | | | | | | |
| Szabolcs Baranyi | 6 | 5 | | | | | | Cliff Richey | 7 | 6 | | | | |
| Georges Goven | 7 | 7 | | | | | | Georges Goven | 5 | 3 | | | | |
| Haroon Rahim | 6 | 5 | | Georges Goven | 6 | 6 | | | | | | | | |
| Colin Dibley | 4 | 6 | | Pierre Barthès | 3 | 1 | | | | | | | | |
| Pierre Barthès | 6 | 7 | | | | | | | | | Cliff Richey | 6 | 0 | 2 |
| Clark Graebner | 4 | 2 | | | | | | | | | Ilie Năstase | 3 | 6 | 6 |
| Jim McManus | 6 | 6 | | Jim McManus | 6 | 3 | 1 | | | | | | | |
| Ian Crookenden | 7 | 7 | | Ian Crookenden | 4 | 6 | 6 | | | | | | | |
| Onny Parun | 5 | 6 | | | | | | Ian Crookenden | 1 | 3 | | | | |
| Tom Edlefsen | 2 | 7 | 6 | | | | | Ilie Năstase | 6 | 6 | | | | |
| Patricio Cornejo | 6 | 6 | 2 | Tom Edlefsen | 2 | 1 | | | | | | | | |
| Jim Osborne | 4 | 3 | | Ilie Năstase | 6 | 6 | | | | | | | | |
| Ilie Năstase | 6 | 6 | | | | | | | | | | | | |