# 1990 Norstar Bank Hamlet Challenge Cup – Singles

Ivan Lendl was the defending champion (the previous year was an exhibition), but chose not to participate that year.
Stefan Edberg won in the final 7–6$^{(7–3)}$, 6–3, against Goran Ivanišević.

## Seeds

The top four seeds receive a bye into the second round.
* Stefan Edberg (champion)
* Andrés Gómez (quarterfinals)
* Brad Gilbert (quarterfinals)
* Pete Sampras (quarterfinals)
* Goran Ivanišević (final)
* John McEnroe (semifinals)
* Jonas Svensson (quarterfinals)
* Guy Forget (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 |
| 1 | Stefan Edberg | 6 | 6 | | | | | |
| 6/WC | John McEnroe | 1 | 4 | | | | | |
| 6/WC | John McEnroe | 1 | 4 | | 1 | Stefan Edberg | 7$^7$ | 6 |
| | | | | | 5 | Goran Ivanišević | 6$^3$ | 3 |
| 5 | Goran Ivanišević | 6 | 1 | 6 | 5 | Goran Ivanišević | 6$^3$ | 3 |
| 8 | Guy Forget | 2 | 6 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | S Edberg | 3 | 6 | 6 | | | | | | | | |
| WC | D Wheaton | 6 | 3 | 6 | WC | D Wheaton | 6 | 1 | 2 | | | | | | | | |
| | J Arias | 3 | 6 | 1 | | | | | | 1 | S Edberg | 6 | 6 | | | | |
| | A Antonitsch | 4 | 3 | | | | | | | 7 | J Svensson | 4 | 2 | | | | |
| WC | Y Noah | 6 | 6 | | WC | Y Noah | 4 | 4 | | | | | | | | | |
| | O Delaître | 3 | 4 | | 7 | J Svensson | 6 | 6 | | | | | | | | | |
| 7 | J Svensson | 6 | 6 | | | | | | | | | | | 1 | S Edberg | 6 | 6 |
| | | | | | | | | | | | | | | 6/WC | J McEnroe | 1 | 4 |
| | | | | | 3 | B Gilbert | 2 | 6 | 7 | | | | | | | | |
| | U Riglewski | 2 | 6 | 0 | | C-U Steeb | 6 | 1 | 5 | | | | | | | | |
| | C-U Steeb | 6 | 4 | 6 | | | | | | 3 | B Gilbert | 3 | 2 | | | | |
| | S Bruguera | 6 | 1 | 3 | | | | | | 6/WC | J McEnroe | 6 | 6 | | | | |
| | M Stich | 3 | 6 | 6 | | M Stich | 3 | 5 | | | | | | | | | |
| Q | N Borwick | 4 | 1 | | 6/WC | J McEnroe | 6 | 7 | | | | | | | | | |
| 6/WC | J McEnroe | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | G Ivanišević | 6 | 6 | | | | | | | | | | | | | | | | |
| Q | G Pozzi | 3 | 1 | | 5 | G Ivanišević | 6 | 2 | 6 | | | | | | | | | | |
| Q | W Ferreira | 6 | 6 | | Q | W Ferreira | 2 | 6 | 3 | | | | | | | | | | |
| | R Agénor | 4 | 3 | | | | | | | 5 | G Ivanišević | 7$^7$ | 6 | | | | | | |
| Q | F Montana | 6 | 6 | 6 | | | | | | 4 | P Sampras | 6$^5$ | 3 | | | | | | |
| | J-P Fleurian | 7 | 2 | 3 | Q | F Montana | 4 | 6 | | | | | | | | | | | |
| | | | | | 4 | P Sampras | 6 | 7 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 5 | G Ivanišević | 6 | 1 | 6 |
| 8 | G Forget | 7 | 7 | | | | | | | | | | | | 8 | G Forget | 2 | 6 | 3 |
| | G Muller | 6 | 6 | | 8 | G Forget | 6 | 6 | | | | | | | | | | | |
| | G Bloom | 1 | 2 | | | P Haarhuis | 3 | 3 | | | | | | | | | | | |
| | P Haarhuis | 6 | 6 | | | | | | | 8 | G Forget | 6$^4$ | 6 | 7 | | | | | |
| | B Shelton | 6 | 6 | 1 | | | | | | 2 | A Gómez | 7$^7$ | 0 | 5 | | | | | |
| | E Jelen | 7 | 0 | 6 | | E Jelen | 4 | 6 | 3 | | | | | | | | | | |
| | | | | | 2 | A Gómez | 6 | 3 | 6 | | | | | | | | | | |