# 1998 Heineken Open – Singles

First-seeded Marcelo Ríos defeated Richard Fromberg 4–6, 6–4, 7–6$^{(7–3)}$ to win the 1998 Heineken Open singles competition. Jonas Björkman was the champion but did not defend his title.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Marcelo Ríos (champion)
* Félix Mantilla (semifinals)
* Dominik Hrbatý (quarterfinals)
* Marcelo Filippini (first round)
* Jeff Tarango (second round)
* Brett Steven (second round)
* Daniel Vacek (first round)
* Javier Sánchez (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 | Final | Final | Final | Final | Final |
| 1 | M Ríos | 6 | 6 | | | | | | | | | | | | | | | | | | | | |
| | N Lapentti | 3 | 3 | | 1 | M Ríos | 7 | 6 | | | | | | | | | | | | | | | |
| | F Meligeni | 4 | 6 | 6$^6$ | WC | M Nielsen | 5 | 1 | | | | | | | | | | | | | | | |
| WC | M Nielsen | 6 | 1 | 7$^8$ | | | | | | 1 | M Ríos | 5 | 6 | 6 | | | | | | | | | |
| | K Carlsen | 6 | 6 | | | | | | | | K Carlsen | 7 | 4 | 1 | | | | | | | | | |
| | J Viloca | 2 | 3 | | | K Carlsen | 6 | 6 | | | | | | | | | | | | | | | |
| WC | A Hunt | 6 | 7$^7$ | | WC | A Hunt | 1 | 3 | | | | | | | | | | | | | | | |
| 7 | D Vacek | 4 | 6$^0$ | | | | | | | | | | | | 1 | M Ríos | 6 | 6 | | | | | |
| 4 | M Filippini | 7$^7$ | 3 | 2 | | | | | | | | | | | | B Black | 1 | 3 | | | | | |
| | M Washington | 6$^1$ | 6 | 6 | | M Washington | 0 | 4 | | | | | | | | | | | | | | | |
| | B Black | 6 | 6 | | | B Black | 6 | 6 | | | | | | | | | | | | | | | |
| | A Gaudenzi | 1 | 3 | | | | | | | | B Black | 6 | 2 | 7 | | | | | | | | | |
| Q | C Vinck | 6 | 7$^7$ | | | | | | | Q | C Vinck | 4 | 6 | 5 | | | | | | | | | |
| Q | G Weiner | 1 | 6$^3$ | | Q | C Vinck | 4 | 6 | 6 | | | | | | | | | | | | | | |
| Q | B MacPhie | 6 | 3 | 2 | 5 | J Tarango | 6 | 1 | 1 | | | | | | | | | | | | | | |
| 5 | J Tarango | 3 | 6 | 6 | | | | | | | | | | | | | | | 1 | Marcelo Ríos | 4 | 6 | 7$^7$ |
| 6 | B Steven | 6 | 6 | | | | | | | | | | | | | | | | | Richard Fromberg | 6 | 4 | 6$^3$ |
| WC | T Susnjak | 1 | 2 | | 6 | B Steven | 6$^4$ | 3 | | | | | | | | | | | | | | | |
| | R Fromberg | 3 | | | | R Fromberg | 7$^7$ | 6 | | | | | | | | | | | | | | | |
| | K Alami | 0 | R | | | | | | | | R Fromberg | 6 | 7$^8$ | | | | | | | | | | |
| | M Damm | 7$^7$ | 6 | | | | | | | 3 | D Hrbatý | 2 | 6$^6$ | | | | | | | | | | |
| | C Ruud | 6$^5$ | 3 | | | M Damm | 3 | 4 | | | | | | | | | | | | | | | |
| | R Reneberg | 2 | 4 | | 3 | D Hrbatý | 6 | 6 | | | | | | | | | | | | | | | |
| 3 | D Hrbatý | 6 | 6 | | | | | | | | | | | | | R Fromberg | 6 | 7$^{10}$ | | | | | |
| 8 | J Sánchez | 6 | 7 | | | | | | | | | | | | 2 | F Mantilla | 3 | 6$^8$ | | | | | |
| | G Stafford | 4 | 5 | | 8 | J Sánchez | 0 | 1 | | | | | | | | | | | | | | | |
| | L Roux | 6 | 2 | 3 | | C Costa | 6 | 6 | | | | | | | | | | | | | | | |
| | C Costa | 1 | 6 | 6 | | | | | | | C Costa | 2 | 3 | | | | | | | | | | |
| Q | M Sell | 6 | 2 | 7 | | | | | | 2 | F Mantilla | 6 | 6 | | | | | | | | | | |
| | M Tillström | 3 | 6 | 5 | Q | M Sell | 3 | 6$^7$ | | | | | | | | | | | | | | | |
| | J van Herck | 6$^3$ | 3 | | 2 | F Mantilla | 6 | 7$^9$ | | | | | | | | | | | | | | | |
| 2 | F Mantilla | 7$^7$ | 6 | | | | | | | | | | | | | | | | | | | | |