# 1990 Virginia Slims of California – Singles

Zina Garrison was the defending champion, but lost in the semifinals to Monica Seles.
Seles won the title by defeating Martina Navratilova 6–3, 7–6$^{(7–5)}$ in the final.

## Seeds

* Martina Navratilova (final)
* Monica Seles (champion)
* Zina Garrison (semifinals)
* Barbara Paulus (second round)
* Amy Frazier (second round)
* Judith Wiesner (second round)
* Laura Gildemeister (second round)
* Anne Smith (second 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 | Final | Final | Final | Final |
| 1 | Martina Navratilova | 6 | 6 | | | | | |
| | Meredith McGrath | 4 | 3 | | | | | |
| | Meredith McGrath | 4 | 3 | | 1 | Martina Navratilova | 3 | 6$^5$ |
| | | | | | 2 | Monica Seles | 6 | 7$^7$ |
| 3 | Zina Garrison | 1 | 6 | 2 | 2 | Monica Seles | 6 | 7$^7$ |
| 2 | Monica Seles | 6 | 3 | 6 | | | | |

### Top half

| 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 | M Navratilova | 6 | 6 | | | | | | | | | | |
| | P Tarabini | 3 | 4 | | R White | 2 | 3 | | | | | | | | | | |
| | R White | 6 | 6 | | | | | | 1 | M Navratilova | 6 | 6 | | | | | |
| | R Zrubáková | 6 | 6 | | | | | | | R Zrubáková | 2 | 0 | | | | | |
| | D Faber | 1 | 1 | | R Zrubáková | 6 | 6 | | | | | | | | | | |
| | A Henricksson | 6$^9$ | 4 | 6 | J Wiesner | 2 | 1 | | | | | | | | | | |
| 6 | J Wiesner | 7$^{11}$ | 6 | | | | | | | | | | | 1 | M Navratilova | 6 | 6 |
| | | | | | | | | | | | | | | | M McGrath | 4 | 3 |
| | | | | 4 | B Paulus | 7$^7$ | 1 | 0 | | | | | | | | | |
| | M McGrath | 6 | 7 | | M McGrath | 6$^4$ | 6 | 6 | | | | | | | | | |
| | S Martin | 1 | 5 | | | | | | | M McGrath | 6 | 4 | 6 | | | | |
| | A May | 6$^2$ | 5 | | | | | | | R Fairbank-Nideffer | 3 | 6 | 3 | | | | |
| | R Fairbank-Nideffer | 7$^7$ | 7 | | R Fairbank-Nideffer | 7$^7$ | 6 | | | | | | | | | | |
| | P Louie Harper | 3 | 2 | 8 | A Smith | 6$^5$ | 1 | | | | | | | | | | |
| 8 | A Smith | 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 |
| 5 | A Frazier | 6 | 4 | 6 | | | | | | | | | | | | | | | |
| | A Leand | 0 | 6 | 2 | 5 | A Frazier | 6$^4$ | 7$^7$ | 4 | | | | | | | | | | |
| | M Paz | 6 | 3 | 3 | | M Werdel | 7$^7$ | 6$^4$ | 6 | | | | | | | | | | |
| | M Werdel | 4 | 6 | 6 | | | | | | | M Werdel | 7$^7$ | 1 | 2 | | | | | |
| | ML Daniels | 3 | 6 | 6 | | | | | | 3 | Z Garrison | 6$^3$ | 6 | 6 | | | | | |
| | M Javer | 6 | 2 | 4 | | ML Daniels | 2 | 5 | | | | | | | | | | | |
| | | | | | 3 | Z Garrison | 6 | 7 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 3 | Z Garrison | 1 | 6 | 2 |
| 7 | L Gildemeister | 7 | 6 | | | | | | | | | | | | 2 | M Seles | 6 | 3 | 6 |
| | P Fendick | 5 | 0 | | 7 | L Gildemeister | 4 | 4 | | | | | | | | | | | |
| | M Pierce | 7$^7$ | 1 | 2 | | S Rehe | 6 | 6 | | | | | | | | | | | |
| | S Rehe | 6$^5$ | 6 | 6 | | | | | | | S Rehe | 1 | 2 | | | | | | |
| | A Temesvári | 6 | 6 | | | | | | | 2 | M Seles | 6 | 6 | | | | | | |
| | F Labat | 2 | 0 | | | A Temesvári | 1 | 2 | | | | | | | | | | | |
| | | | | | 2 | M Seles | 6 | 6 | | | | | | | | | | | |