# 1998 Singapore Open – Singles

The 1998 Singapore Open was a men's tennis tournament played on Indoor Hard in Singapore, Singapore that was part of the Championship Series of the 1998 ATP Tour. It was the seventh edition of the tournament and was held from 12 October – 18 October.

## Seeds

Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.
* Marcelo Ríos (champion)
* Goran Ivanišević (second round)
* Michael Chang (first round)
* Jan-Michael Gambill (quarterfinals)
* Andrew Ilie (first round)
* Mikael Tillström (second round)
* Paul Haarhuis (first round)
* Ramón Delgado (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 | Semifinals | Final | Final | Final | Final |
| 1 | Marcelo Ríos | 6 | 6 | | | | | |
| | Jim Courier | 2 | 1 | | | | | |
| | Jim Courier | 2 | 1 | | 1 | Marcelo Ríos | 6 | 6 |
| | | | | | | Mark Woodforde | 4 | 2 |
| | Sjeng Schalken | 6 | 4 | 2 | | Mark Woodforde | 4 | 2 |
| | Mark Woodforde | 0 | 6 | 6 | | | | |

### Top half

| 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 |
| 1 | M Ríos | 6 | 6 | | | | | | | | | | | | | | |
| | S Lareau | 2 | 0 | 1 | M Ríos | 6 | 6 | | | | | | | | | | |
| | A Pavel | 7 | 6 | | A Pavel | 2 | 4 | | | | | | | | | | |
| | D van Scheppingen | 6$^3$ | 4 | | | | | | 1 | M Ríos | 5 | 6 | 6 | | | | |
| | L Hewitt | 6 | 7 | | | | | | | L Hewitt | 7 | 3 | 4 | | | | |
| | L Roux | 2 | 6$^6$ | | L Hewitt | 6$^6$ | 6 | 7 | | | | | | | | | |
| | J Gimelstob | 6 | 6 | | J Gimelstob | 7 | 2 | 6$^4$ | | | | | | | | | |
| 8 | R Delgado | 4 | 4 | | | | | | | | | | | 1 | M Ríos | 6 | 6 |
| 4 | J-M Gambill | 6 | 6 | | | | | | | | | | | | J Courier | 2 | 1 |
| | J Stark | 1 | 2 | 4 | J-M Gambill | w/o | | | | | | | | | | | |
| | B Steven | 6 | 6 | | B Steven | | | | | | | | | | | | |
| | C Vinck | 3 | 4 | | | | | | 4 | J-M Gambill | 4 | 4 | | | | | |
| | J Courier | 6 | 6 | | | | | | | J Courier | 6 | 6 | | | | | |
| | D Nestor | 3 | 2 | | J Courier | 6 | 2 | 7 | | | | | | | | | |
| 6 | M Tillström | 6 | 6 | 6 | M Tillström | 4 | 6 | 6$^3$ | | | | | | | | | |
| | M Bhupathi | 1 | 3 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | S Schalken | 6 | 6 | | | | | | | | | | | | | |
| 5 | A Ilie | 4 | 2 | | | S Schalken | 7 | 6 | | | | | | | | |
| | T Woodbridge | 7 | 6$^5$ | 6 | | T Woodbridge | 6$^3$ | 4 | | | | | | | | |
| | S Sargsian | 6$^4$ | 7 | 4 | | | | | S Schalken | 3 | 6 | 6 | | | | |
| | J van Lottum | 7 | 6 | | | | | | J van Lottum | 6 | 3 | 4 | | | | |
| | W Black | 5 | 2 | | | J van Lottum | 6 | 6 | | | | | | | | |
| | M Kohlmann | 2 | 6 | 6 | | M Kohlmann | 4 | 2 | | | | | | | | |
| 3 | M Chang | 6 | 3 | 4 | | | | | | | | | S Schalken | 6 | 4 | 2 |
| | K Carlsen | 0 | 6 | 6 | | | | | | | | | M Woodforde | 0 | 6 | 6 |
| 7 | P Haarhuis | 6 | 3 | 4 | | K Carlsen | 6 | 6 | | | | | | | | |
| | M Damm | 7 | 6 | | | M Damm | 1 | 1 | | | | | | | | |
| | L Paes | 5 | 1 | | | | | | K Carlsen | 6 | 2 | 3 | | | | |
| | M Woodforde | 7 | 6 | | | | | | M Woodforde | 4 | 6 | 6 | | | | |
| | M Ondruska | 6$^4$ | 2 | | | M Woodforde | 6 | 7 | | | | | | | | |
| 2 | G Ivanišević | 6 | 6 | | 2 | G Ivanišević | 4 | 6$^4$ | | | | | | | | |
| | S Campbell | 2 | 1 | | | | | | | | | | | | | |