# 1973 Pacific Coast Open – Singles

The 1973 Pacific Coast Open – Singles was an event of the 1973 Pacific Coast Open tennis tournament and was played on outdoor hard courts at the Round Hill Country Club in Alamo in the San Francisco Bay Area in the United States between September 23 and September 30, 1973. Jimmy Connors was the defending Pacific Coast Championships champion but did not take part in this edition. Fourth-seeded Roy Emerson won the title by defeating sixth-seeded Björn Borg 5–7, 6–1, 6–4 in the final.

## Seeds

* Stan Smith (quarterfinals)
* Arthur Ashe (semifinals)
* Tom Gorman (quarterfinals)
* Roy Emerson (champion)
* Roscoe Tanner (quarterfinals)
* Björn Borg (final)
* Cliff Drysdale (second round)
* John Alexander (quarterfinals)

## 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 | Final | Final | Final | Final | Final |
| | Ray Moore | 3 | 3 | | | | | | |
| 6 | Björn Borg | 6 | 6 | | | | | | |
| 6 | Björn Borg | 6 | 6 | | 6 | Björn Borg | 7 | 1 | 4 |
| | | | | | 4 | Roy Emerson | 5 | 6 | 6 |
| 4 | Roy Emerson | 5 | 6 | 6 | 4 | Roy Emerson | 5 | 6 | 6 |
| 2 | Arthur Ashe | 7 | 2 | 1 | | | | | |

### 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 |
| 1 | Stan Smith | 6 | 6 | | | | | | | | | | | | | | | |
| | Rick Fisher | 2 | 3 | | 1 | Stan Smith | 7 | 4 | 6 | | | | | | | | | |
| | Onny Parun | 7 | 6 | | | Onny Parun | 6 | 6 | 4 | | | | | | | | | |
| | Paul Gerken | 6 | 4 | | | | | | | 1 | Stan Smith | 6 | 4 | | | | | |
| 7 | Cliff Drysdale | 6 | 7 | | | | | | | | Ray Moore | 7 | 6 | | | | | |
| | Mike Estep | 2 | 5 | | 7 | Cliff Drysdale | 4 | 3 | | | | | | | | | | |
| | Bob Carmichael | 6 | 3 | | | Ray Moore | 6 | 6 | | | | | | | | | | |
| | Ray Moore | 7 | 6 | | | | | | | | | | | | | Ray Moore | 3 | 3 |
| 3 | Tom Gorman | 6 | 6 | | | | | | | | | | | | 6 | Björn Borg | 6 | 6 |
| | Jim Delaney | 3 | 3 | | 3 | Tom Gorman | 3 | 7 | 6 | | | | | | | | | |
| | Guillermo Oropez | 3 | 3 | | | Raúl Ramírez | 6 | 6 | 0 | | | | | | | | | |
| | Raúl Ramírez | 6 | 6 | | | | | | | 3 | Tom Gorman | 4 | 7 | 6 | | | | |
| 6 | Björn Borg | 3 | 7 | 7 | | | | | | 6 | Björn Borg | 6 | 5 | 7 | | | | |
| | Milan Holeček | 6 | 6 | 6 | 6 | Björn Borg | 6 | 6 | | | | | | | | | | |
| | Vladimír Zedník | 3 | 7 | 1 | | Vladimír Zedník | 4 | 0 | | | | | | | | | | |
| | Manuel Santana | 6 | 6 | 0$^r$ | | | | | | | | | | | | | | |

### 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 |
| | Jeff Borowiak | 6 | 6 | | | | | | | | | | | | | | | | |
| | Fred McNair | 3 | 1 | | | Jeff Borowiak | 2 | 4 | | | | | | | | | | | |
| | Greg Shephard | 3 | 4 | | 5 | Roscoe Tanner | 6 | 6 | | | | | | | | | | | |
| 5 | Roscoe Tanner | 6 | 6 | | | | | | | 5 | Roscoe Tanner | 7 | 5 | 2 | | | | | |
| | Haroon Rahim | 5 | 5 | | | | | | | 4 | Roy Emerson | 5 | 7 | 6 | | | | | |
| | Jeff Austin | 7 | 7 | | | Jeff Austin | 4 | 7 | 3 | | | | | | | | | | |
| | Tom Edlefsen | 2 | 3 | | 4 | Roy Emerson | 6 | 6 | 6 | | | | | | | | | | |
| 4 | Roy Emerson | 6 | 6 | | | | | | | | | | | | 4 | Roy Emerson | 5 | 6 | 6 |
| | Frew McMillan | 5 | 7 | 4 | | | | | | | | | | | 2 | Arthur Ashe | 7 | 2 | 1 |
| | Charlie Pasarell | 7 | 5 | 6 | | Charlie Pasarell | 6 | 4 | | | | | | | | | | | |
| | Jeff Simpson | 4 | 1 | | 8 | John Alexander | 7 | 6 | | | | | | | | | | | |
| 8 | John Alexander | 6 | 6 | | | | | | | 8 | John Alexander | 5 | 6 | 6 | | | | | |
| | Ove Bengtson | 6 | 5 | | | | | | | 2 | Arthur Ashe | 7 | 1 | 7 | | | | | |
| | Dick R. Bohrnstedt | 7 | 7 | | | Dick R. Bohrnstedt | 4 | 4 | | | | | | | | | | | |
| | John Lloyd | 3 | 3 | | 2 | Arthur Ashe | 6 | 6 | | | | | | | | | | | |
| 2 | Arthur Ashe | 6 | 6 | | | | | | | | | | | | | | | | |