There were no defending champions in this edition, as the last year final was cancelled due to rain. Patty Fendick and Jill Hetherington, winners of the 1988 edition, did not compete this year.
| Doubles | |
|---|---|
| 1990 Puerto Rico Open | |
| Champions |  Elena Brioukhovets Natalia Medvedeva |
| Runners-up |  Amy Frazier Julie Richardson |
| Score | 6–4, 6–2 |
| Draw | 16 (1WC) |
| Seeds | 4 |
Elena Brioukhovets and Natalia Medvedeva won the title by defeating Amy Frazier and Julie Richardson 6–4, 6–2 in the final.[1]
Seeds edit
Gigi Fernández / Zina Garrison (first round)- Meredith McGrath / Lori McNeil (quarterfinals, withdrew)
Nicole Provis / 
Elna Reinach (first round)- Katrina Adams / Penny Barg-Mager (semifinals)
Draw edit
Key edit
- 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
Draw edit
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | G Fernández Z Garrison
| 3 | 65 | ||||||||||||||||||||||||
| C Benjamin Ca MacGregor
| 6 | 77 | C Benjamin Ca MacGregor
| 3 | 7 | 2 | |||||||||||||||||||||
| WC |  Maribel Amadeo Camille Baldrich
| 1 | 2 | A Frazier J Richardson
| 6 | 5 | 6 | ||||||||||||||||||||
| A Frazier J Richardson
| 6 | 6 | A Frazier J Richardson
| 4 | 6 | 6 | |||||||||||||||||||||
| 4 | K Adams P Barg-Mager
| 6 | 6 | 4 | K Adams P Barg-Mager
| 6 | 3 | 4 | |||||||||||||||||||
 S Albinus L Corsato
| 3 | 4 | 4 | K Adams P Barg-Mager
| 6 | 6 | |||||||||||||||||||||
 L Ferrando M Strandlund
| 6 | 6 | L Ferrando M Strandlund
| 3 | 2 | ||||||||||||||||||||||
 S Smith H ter Riet
| 4 | 2 | A Frazier J Richardson
| 4 | 2 | ||||||||||||||||||||||
 H Kelesi R Reggi
| 6 | 6 | E Brioukhovets N Medvedeva
| 6 | 6 | ||||||||||||||||||||||
 B Fulco F Labat
| 3 | 4 | H Kelesi R Reggi
| 2 | 4 | ||||||||||||||||||||||
| E Brioukhovets N Medvedeva
| 6 | 77 | E Brioukhovets N Medvedeva
| 6 | 6 | ||||||||||||||||||||||
| 3 |  N Provis E Reinach
| 3 | 64 | E Brioukhovets N Medvedeva
| 7 | 6 | |||||||||||||||||||||
| C Cunningham F Haumüller
| 4 | 1 | A Grossman R Stubbs
| 5 | 3 | ||||||||||||||||||||||
| A Grossman R Stubbs
| 6 | 6 | A Grossman R Stubbs
| w/o | |||||||||||||||||||||||
| L Barnard W White-Prausa
| 5 | 4 | 2 | M McGrath L McNeil
| |||||||||||||||||||||||
| 2 | M McGrath L McNeil
| 7 | 6 | ||||||||||||||||||||||||
References edit
- ^ Munn, Scott (1 February 1991). "Frazier: For Now, School Can Wait". The Oklahoman. Retrieved 6 December 2023.
Frazier's only other title appearance her rookie campaign was when she and Julie Richardson of Auckland, New Zealand, dropped the Puerto Rico Open doubles crown to Elena Brioukhovets and Natalia Medvedeva.