1989 New South Wales Open – Men's singles
# 1989 New South Wales Open – Men's singles

John Fitzgerald was the defending champion but did not compete that year.

Aaron Krickstein won in the final 6–4, 6–2 against Andrei Cherkasov.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.

* Henri Leconte (first round)
* Andrei Chesnokov (first round)
* Aaron Krickstein (champion)
* Jonas Svensson (first round)
* Darren Cahill (first round)
* Christo van Rensburg (quarterfinals)
* Wally Masur (quarterfinals)
* Magnus Gustafsson (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

| 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | H Leconte | 4 | 3 | | | | | | | | | | | | | | | | | | | | |
| | P Lundgren | 6 | 6 | | | P Lundgren | 6 | 6 | 2 | | | | | | | | | | | | | | |
| | J Nyström | 4 | 0 | | | B Orešar | 2 | 7 | 6 | | | | | | | | | | | | | | |
| | B Orešar | 6 | 6 | | | | | | | | B Orešar | 7 | 6 | | | | | | | | | | |
| | T Tulasne | 6 | 7 | | | | | | | 7 | W Masur | 5 | 4 | | | | | | | | | | |
| | D Nargiso | 4 | 6 | | | T Tulasne | 5 | 2 | | | | | | | | | | | | | | | |
| | P Kühnen | 3 | 7 | 4 | 7 | W Masur | 7 | 6 | | | | | | | | | | | | | | | |
| 7 | W Masur | 6 | 5 | 6 | | | | | | | | | | | | B Orešar | 0 | 6 | 4 | | | | |
| 3 | A Krickstein | 6 | 6 | 6 | | | | | | | | | | | 3 | A Krickstein | 6 | 2 | 6 | | | | |
| | P Aldrich | 3 | 7 | 2 | 3 | A Krickstein | 6 | 6 | | | | | | | | | | | | | | | |
| | J Rive | 6 | 7 | | | J Rive | 3 | 4 | | | | | | | | | | | | | | | |
| WC | P Doohan | 4 | 6 | | | | | | | 3 | A Krickstein | 2 | 6 | 6 | | | | | | | | | |
| | M Davis | 6 | 7 | | | | | | | | C-U Steeb | 6 | 3 | 3 | | | | | | | | | |
| | G Layendecker | 4 | 6 | | | M Davis | 5 | 3 | | | | | | | | | | | | | | | |
| | C-U Steeb | 6 | 4 | 6 | | C-U Steeb | 7 | 6 | | | | | | | | | | | | | | | |
| 5 | D Cahill | 3 | 6 | 1 | | | | | | | | | | | | | | | | 3 | Aaron Krickstein | 6 | 6 |
| 6 | C van Rensburg | 6 | 7 | | | | | | | | | | | | | | | | | WC | Andrei Cherkasov | 4 | 2 |
| | A Olhovskiy | 3 | 6 | | 6 | C van Rensburg | 7 | 7 | | | | | | | | | | | | | | | |
| Q | B Talbot | 2 | 3 | | | A Volkov | 6 | 6 | | | | | | | | | | | | | | | |
| | A Volkov | 6 | 6 | | | | | | | 6 | C van Rensburg | 5 | 3 | | | | | | | | | | |
| | J Frawley | 5 | 6 | 2 | | | | | | Q | O Delaître | 7 | 6 | | | | | | | | | | |
| | J Stoltenberg | 7 | 4 | 6 | | J Stoltenberg | 6 | 2 | | | | | | | | | | | | | | | |
| Q | O Delaître | 6 | 6 | | Q | O Delaître | 7 | 6 | | | | | | | | | | | | | | | |
| 4 | J Svensson | 2 | 4 | | | | | | | | | | | | Q | O Delaître | 5 | 1 | | | | | |
| 8 | M Gustafsson | 6 | 6 | | | | | | | | | | | | WC | A Cherkasov | 7 | 6 | | | | | |
| Q | A Mronz | 2 | 2 | | 8 | M Gustafsson | 6 | 1 | 1 | | | | | | | | | | | | | | |
| | J Gunnarsson | 6 | 4 | 3 | Q | L Němeček | 3 | 6 | 6 | | | | | | | | | | | | | | |
| Q | L Němeček | 3 | 6 | 6 | | | | | | Q | L Němeček | 1 | 3 | | | | | | | | | | |
| | L Lavalle | 4 | 1 | | | | | | | WC | A Cherkasov | 6 | 6 | | | | | | | | | | |
| WC | A Cherkasov | 6 | 6 | | WC | A Cherkasov | 6 | 6 | | | | | | | | | | | | | | | |
| | C Saceanu | 4 | 6 | 6 | | C Saceanu | 3 | 3 | | | | | | | | | | | | | | | |
| 2 | A Chesnokov | 6 | 4 | 4 | | | | | | | | | | | | | | | | | | | |
