# 1989 Los Angeles Open – Singles

Mikael Pernfors was the defending champion but lost in the quarterfinals to Brad Gilbert.
Aaron Krickstein won in the final 2–6, 6–4, 6–2 against Michael Chang.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Michael Chang (final)
* Brad Gilbert (semifinals)
* Tim Mayotte (first round)
* Mats Wilander (first round)
* Aaron Krickstein (champion)
* Kevin Curren (quarterfinals)
* Christo van Rensburg (first round)
* Mikael Pernfors (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
| 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 | Final | Final | Final | Final | Final |
| 1 | M Chang | 7 | 6 | | | | | | | | | | | | | | | | | | | | | |
| WC | P Sampras | 6 | 0 | | 1 | M Chang | 6 | 6 | | | | | | | | | | | | | | | | |
| Q | K Thorne | 2 | 6 | 6 | Q | K Thorne | 1 | 1 | | | | | | | | | | | | | | | | |
| | P Lundgren | 6 | 3 | 3 | | | | | | 1 | M Chang | 6 | 6 | | | | | | | | | | | |
| Q | J Arias | 6 | 6 | | | | | | | | D Cahill | 1 | 3 | | | | | | | | | | | |
| Q | M Anger | 2 | 4 | | Q | J Arias | 3 | 2 | | | | | | | | | | | | | | | | |
| | D Cahill | 1 | 7 | 6 | | D Cahill | 6 | 6 | | | | | | | | | | | | | | | | |
| 7 | C van Rensburg | 6 | 5 | 1 | | | | | | | | | | | 1 | M Chang | 6 | 6 | | | | | | |
| 4 | M Wilander | 7 | 5 | 2 | | | | | | | | | | | | S Davis | 4 | 4 | | | | | | |
| | D Rostagno | 6 | 7 | 6 | | D Rostagno | 7 | 6 | 2 | | | | | | | | | | | | | | | |
| | S Davis | 6 | 6 | | | S Davis | 6 | 7 | 6 | | | | | | | | | | | | | | | |
| Q | G Michibata | 3 | 2 | | | | | | | | S Davis | 3 | 7 | 7 | | | | | | | | | | |
| | D Wheaton | 7 | 6 | | | | | | | 6 | K Curren | 6 | 6 | 5 | | | | | | | | | | |
| | P Annacone | 6 | 1 | | | D Wheaton | 6 | 3 | 6 | | | | | | | | | | | | | | | |
| | P Chamberlin | 6 | 1 | 2 | 6 | K Curren | 3 | 6 | 7 | | | | | | | | | | | | | | | |
| 6 | K Curren | 1 | 6 | 6 | | | | | | | | | | | | | | | | 1 | Michael Chang | 6 | 4 | 2 |
| 5 | A Krickstein | 7 | 6 | | | | | | | | | | | | | | | | | 5 | Aaron Krickstein | 2 | 6 | 6 |
| | J Fitzgerald | 5 | 2 | | 5 | A Krickstein | 6 | 6 | | | | | | | | | | | | | | | | |
| | K Evernden | 6 | 6 | 2 | | R Agénor | 1 | 4 | | | | | | | | | | | | | | | | |
| | R Agénor | 7 | 4 | 6 | | | | | | 5 | A Krickstein | 6 | 6 | | | | | | | | | | | |
| | P Aldrich | 4 | 6 | 6 | | | | | | | A Sznajder | 0 | 3 | | | | | | | | | | | |
| | J Courier | 6 | 3 | 1 | | P Aldrich | 1 | 4 | | | | | | | | | | | | | | | | |
| | A Sznajder | 6 | 3 | 7 | | A Sznajder | 6 | 6 | | | | | | | | | | | | | | | | |
| 3 | T Mayotte | 4 | 6 | 5 | | | | | | | | | | | 5 | A Krickstein | 1 | 7 | 6 | | | | | |
| 8 | M Pernfors | 4 | 6 | 6 | | | | | | | | | | | 2 | B Gilbert | 6 | 6 | 2 | | | | | |
| | M Woodforde | 6 | 3 | 4 | 8 | M Pernfors | 6 | 6 | | | | | | | | | | | | | | | | |
| WC | S Živojinović | 6 | 2 | 7 | WC | S Živojinović | 3 | 0 | | | | | | | | | | | | | | | | |
| | J Pugh | 2 | 6 | 6 | | | | | | 8 | M Pernfors | 4 | 1 | | | | | | | | | | | |
| | A Järryd | 7 | 6 | | | | | | | 2 | B Gilbert | 6 | 6 | | | | | | | | | | | |
| | R Reneberg | 6 | 2 | | | A Järryd | 2 | 6 | | | | | | | | | | | | | | | | |
| WC | D Pate | 5 | 2 | | 2 | B Gilbert | 6 | 7 | | | | | | | | | | | | | | | | |
| 2 | B Gilbert | 7 | 6 | | | | | | | | | | | | | | | | | | | | | |