# 1990 KAL Cup Korea Open – Singles

Robert Van't Hof was the defending champion, but did not participate this year.
Alex Antonitsch won the tournament, beating Pat Cash in the final, 7–6, 6–3.

## Seeds

* Wally Masur (second round)
* Amos Mansdorf (first round)
* Paul Chamberlin (first round)
* Kelly Evernden (second round)
* Milan Šrejber (quarterfinals)
* Dan Goldie (semifinals)
* Thomas Högstedt (first round)
* Gilad Bloom (semifinals)

## 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 |
| 8 | Gilad Bloom | 3 | 3 | | | | | |
| Q | Pat Cash | 6 | 6 | | | | | |
| Q | Pat Cash | 6 | 6 | | Q | Pat Cash | 6 | 3 |
| | | | | | | Alex Antonitsch | 7 | 6 |
| 6 | Dan Goldie | 6 | 3 | 6 | | Alex Antonitsch | 7 | 6 |
| | Alex Antonitsch | 4 | 6 | 7 | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | W Masur | 6 | 6 | | | | | | | | | | | | | | |
| | C Saceanu | 2 | 2 | | 1 | W Masur | 7 | 6 | 4 | | | | | | | | |
| | R Matuszewski | 6 | 6 | 6 | | R Matuszewski | 6 | 7 | 6 | | | | | | | | |
| | J Stoltenberg | 2 | 7 | 2 | | | | | | | R Matuszewski | 2 | 2 | | | | |
| | M Nido | 6 | 1 | | | | | | | 8 | G Bloom | 6 | 6 | | | | |
| | S Živojinović | 0 | 0$^r$ | | | M Nido | 4 | 3 | | | | | | | | | |
| | S Youl | 3 | 1 | | 8 | G Bloom | 6 | 6 | | | | | | | | | |
| 8 | G Bloom | 6 | 6 | | | | | | | | | | | 8 | G Bloom | 3 | 3 |
| 3 | P Chamberlin | 5 | 2 | | | | | | | | | | | Q | P Cash | 6 | 6 |
| | G Connell | 7 | 6 | | | G Connell | 7 | 5 | 2 | | | | | | | | |
| | M Laurendeau | 4 | 3 | | Q | P Cash | 6 | 7 | 6 | | | | | | | | |
| Q | P Cash | 6 | 6 | | | | | | | Q | P Cash | 6 | 6 | | | | |
| Q | N Brown | 4 | 3 | | | | | | | 5 | M Šrejber | 2 | 3 | | | | |
| Q | J Carlsson | 6 | 6 | | Q | J Carlsson | 0 | 4 | | | | | | | | | |
| | T Nijssen | 3 | 1 | | 5 | M Šrejber | 6 | 6 | | | | | | | | | |
| 5 | M Šrejber | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | D Goldie | 6 | 2 | 6 | | | | | | | | | | | | | | |
| | T Woodbridge | 4 | 6 | 4 | 6 | D Goldie | 4 | 6 | 6 | | | | | | | | | |
| WC | J-s Kim | 5 | 4 | | | J Rive | 6 | 3 | 4 | | | | | | | | | |
| | J Rive | 7 | 6 | | | | | | | 6 | D Goldie | 7 | 6 | | | | | |
| | N Pereira | 1 | 3 | | | | | | | Q | S Matsuoka | 5 | 2 | | | | | |
| Q | S Matsuoka | 6 | 6 | | Q | S Matsuoka | 6 | 6 | | | | | | | | | | |
| WC | J-h Lee | 3 | 1 | | 4 | K Evernden | 3 | 1 | | | | | | | | | | |
| 4 | K Evernden | 6 | 6 | | | | | | | | | | | 6 | D Goldie | 6 | 3 | 6 |
| 7 | T Högstedt | 5 | 6 | 4 | | | | | | | | | | | A Antonitsch | 4 | 6 | 7 |
| | L Shiras | 7 | 4 | 6 | | L Shiras | 1 | 0 | | | | | | | | | | |
| | A Antonitsch | 6 | 6 | | | A Antonitsch | 6 | 6 | | | | | | | | | | |
| | K Jones | 4 | 4 | | | | | | | | A Antonitsch | 6 | 6 | | | | | |
| WC | B-S Kim | 5 | 6 | 6 | | | | | | | P Kühnen | 4 | 4 | | | | | |
| | P Kühnen | 7 | 2 | 7 | | P Kühnen | 6 | 6 | | | | | | | | | | |
| | L-A Wahlgren | 6 | 7 | | | L-A Wahlgren | 0 | 1 | | | | | | | | | | |
| 2 | A Mansdorf | 4 | 5 | | | | | | | | | | | | | | | |