# 1991 KAL Cup Korea Open – Singles

Alex Antonitsch was the defending champion, but he lost in the quarterfinals this year.
Patrick Baur won the tournament, beating Jeff Tarango in the final, 6–4, 1–6, 7–6$^{(7–5)}$.

## Seeds

* Jan Siemerink (semifinals)
* Alex Antonitsch (semifinals)
* Jim Grabb (first round)
* Richard Krajicek (quarterfinals)
* Alexander Mronz (first round)
* Gilad Bloom (semifinals)
* Grant Connell (first round)
* Patrik Kühnen (first 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 | Final | Final | Final | Final |
| Shuzo Matsuoka | 6$^6$ | 2 | | | | | |
| Patrick Baur | 7$^8$ | 6 | | | | | |
| Patrick Baur | 7$^8$ | 6 | | Patrick Baur | 6 | 1 | 7$^7$ |
| | | | | Jeff Tarango | 4 | 6 | 6$^5$ |
| Jeff Tarango | 2 | 7 | 6 | Jeff Tarango | 4 | 6 | 6$^5$ |
| Luis Herrera | 6 | 5 | 3 | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 1 | J Siemerink | 6 | 2 | 6 | | | | | | | | | | | | | |
| Q | N Brown | 4 | 6 | 2 | 1 | J Siemerink | 3 | 7$^7$ | 6 | | | | | | | | |
| | K Braasch | 6 | 6 | | | K Braasch | 6 | 6$^3$ | 3 | | | | | | | | |
| | A Sznajder | 1 | 1 | | | | | | | 1 | J Siemerink | 6 | 2 | 4 | | | |
| Q | Ģ Dzelde | 6 | 6 | | | | | | | | S Matsuoka | 4 | 6 | 6 | | | |
| Q | P Wekesa | 4 | 4 | | Q | Ģ Dzelde | 2 | 1 | | | | | | | | | |
| | S Matsuoka | 7 | 4 | 6 | | S Matsuoka | 6 | 6 | | | | | | | | | |
| 8 | P Kühnen | 5 | 6 | 2 | | | | | | | | | | | S Matsuoka | 6$^6$ | 2 |
| 4 | R Krajicek | 6 | 6 | | | | | | | | | | | | P Baur | 7$^8$ | 6 |
| | J Apell | 1 | 4 | | 4 | R Krajicek | 7$^8$ | 6 | | | | | | | | | |
| | E Masso | 6 | 1 | 3 | | D Goldie | 6$^6$ | 0 | | | | | | | | | |
| | D Goldie | 2 | 6 | 6 | | | | | | 4 | R Krajicek | 5 | 7$^9$ | 2 | | | |
| | S Melville | 6 | 7 | | | | | | | | P Baur | 7 | 6$^7$ | 6 | | | |
| | S Stolle | 1 | 5 | | | S Melville | 2 | 1 | | | | | | | | | |
| | P Baur | 7$^7$ | 6 | | | P Baur | 6 | 6 | | | | | | | | | |
| 5 | A Mronz | 6$^3$ | 0 | | | | | | | | | | | | | | |

### 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 |
| 6 | G Bloom | 6 | 6 | | | | | | | | | | | | | | |
| | M Šrejber | 0 | 1 | | 6 | G Bloom | 6 | 6 | | | | | | | | | |
| WC | J-s Kim | 6 | 0 | 1 | WC | E-j Chang | 4 | 1 | | | | | | | | | |
| WC | E-j Chang | 3 | 6 | 6 | | | | | | 6 | G Bloom | 1 | 6$^6$ | | | | |
| | K Evernden | 4 | 4 | | | | | | | | J Tarango | 6 | 7$^8$ | | | | |
| | J Tarango | 6 | 6 | | | J Tarango | 2 | 6 | 6 | | | | | | | | |
| WC | S-h Ji | 7$^7$ | 5 | 6 | WC | S-h Ji | 6 | 2 | 1 | | | | | | | | |
| 3 | J Grabb | 6$^4$ | 7 | 4 | | | | | | | | | | J Tarango | 2 | 7 | 6 |
| 7 | G Connell | 4 | 6 | 6$^5$ | | | | | | | | | | L Herrera | 6 | 5 | 3 |
| | B Shelton | 6 | 1 | 7$^7$ | | B Shelton | 3 | 3 | | | | | | | | | |
| | J Eltingh | 7 | 3 | 3 | | L Herrera | 6 | 6 | | | | | | | | | |
| | L Herrera | 5 | 6 | 6 | | | | | | | L Herrera | 6 | 6 | | | | |
| LL | M Oosting | 1 | 6 | 6 | | | | | | 2 | A Antonitsch | 1 | 2 | | | | |
| Q | H-c Shin | 6 | 3 | 4 | LL | M Oosting | 0 | 2 | | | | | | | | | |
| | B Garrow | 0 | 4 | | 2 | A Antonitsch | 6 | 6 | | | | | | | | | |
| 2 | A Antonitsch | 6 | 6 | | | | | | | | | | | | | | |