| Singles | |
|---|---|
| 1998 Australian Men's Hardcourt Championships | |
| Champion |  Lleyton Hewitt [1] |
| Runner-up | Jason Stoltenberg |
| Score | 3–6, 6–3, 7–6(7–4) |
| Draw | 32 |
| Seeds | 8 |
Todd Woodbridge was the defending champion, but lost to Jason Stoltenberg in the semifinals.
Sixteen-year old wild card and Adelaide native Lleyton Hewitt won his first ATP title defeated Stoltenberg in the final, 3–6, 6–3, 7–6(7–4). Stoltenberg would go on to coach Hewitt, beginning in 2001.
Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.
Jonas Björkman (second round)
Gustavo Kuerten (second round)
Jim Courier (first round) Magnus Norman (second round) Todd Woodbridge (semifinals)
Nicolas Kiefer (first round) Thomas Johansson (second round)
Dominik Hrbatý (first round)| Semifinals | Final [1] | ||||||||||||
| Jason Stoltenberg | 6 | 6 | |||||||||||
| 5 | Todd Woodbridge | 4 | 1 | ||||||||||
| Jason Stoltenberg | 6 | 3 | 64 | ||||||||||
| WC | Lleyton Hewitt | 3 | 6 | 77 | |||||||||
| WC | Lleyton Hewitt | 77 | 77 | ||||||||||
| WC | Andre Agassi | 65 | 64 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | J Björkman | 6 | 6 | ||||||||||||||||||||||||
 G Stafford | 4 | 2 | 1 | J Björkman | 5 | 1 | |||||||||||||||||||||
| J Stoltenberg | 6 | 6 | J Stoltenberg | 7 | 6 | ||||||||||||||||||||||
 J Marín | 4 | 1 | J Stoltenberg | 63 | 6 | 7 | |||||||||||||||||||||
| Q |  N Escudé | 6 | 7 | Q | N Escudé | 77 | 1 | 5 | |||||||||||||||||||
| Rădulescu | 0 | 5 | Q | N Escudé | 4 | 6 | 6 | ||||||||||||||||||||
 B Black | 5 | 3 | 7 | T Johansson | 6 | 4 | 4 | ||||||||||||||||||||
| 7 | T Johansson | 7 | 6 | J Stoltenberg | 6 | 6 | |||||||||||||||||||||
| 4 | M Norman | 6 | 1 | 6 | 5 | T Woodbridge | 4 | 1 | |||||||||||||||||||
 C Ruud | 3 | 6 | 4 | 4 | M Norman | 6 | 2 | 1r | |||||||||||||||||||
| Q | J Golmard | 6 | 6 | Q | J Golmard | 1 | 6 | 0 | |||||||||||||||||||
| Q | D Dier | 3 | 4 | Q | J Golmard | 6 | 4 | 4 | |||||||||||||||||||
| R Fromberg | 6 | 3 | 5 | 5 | T Woodbridge | 2 | 6 | 6 | |||||||||||||||||||
| Q | J Knippschild | 3 | 6 | 7 | Q | J Knippschild | 710 | 2 | 4 | ||||||||||||||||||
 M Damm | 5 | 6 | 3 | 5 | T Woodbridge | 68 | 6 | 6 | |||||||||||||||||||
| 5 | T Woodbridge | 7 | 4 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | N Kiefer | 3 | 6 | 4 | |||||||||||||||||||||||
| V Spadea | 6 | 4 | 6 | V Spadea | 6 | 6 | |||||||||||||||||||||
| S Doseděl | 4 | 6 | 6 | S Doseděl | 1 | 2 | |||||||||||||||||||||
 A Gaudenzi | 6 | 2 | 1 | V Spadea | 5 | 6 | 1 | ||||||||||||||||||||
| S Draper | 4 | 4 | WC | L Hewitt | 7 | 3 | 6 | ||||||||||||||||||||
| WC | L Hewitt | 6 | 6 | WC | L Hewitt | 4 | 77 | 6 | |||||||||||||||||||
| M Woodforde | 7 | 6 | M Woodforde | 6 | 61 | 1 | |||||||||||||||||||||
| 3 | J Courier | 5 | 3 | WC | L Hewitt | 77 | 77 | ||||||||||||||||||||
| 8 | D Hrbatý | 3 | 77 | 3 | WC | A Agassi | 65 | 64 | |||||||||||||||||||
 J Siemerink | 6 | 65 | 6 | J Siemerink | 4 | 3 | |||||||||||||||||||||
 S Sargsian | 6 | 3 | 3 | WC | A Agassi | 6 | 6 | ||||||||||||||||||||
| WC | A Agassi | 4 | 6 | 6 | WC | A Agassi | 1 | 6 | 6 | ||||||||||||||||||
 B Steven | 6 | 6 | B Steven | 6 | 1 | 1 | |||||||||||||||||||||
| L Roux | 3 | 3 | B Steven | 6 | 6 | ||||||||||||||||||||||
 K Carlsen | 65 | 5 | WC/2 | G Kuerten | 3 | 3 | |||||||||||||||||||||
| WC/2 | G Kuerten | 77 | 7 | ||||||||||||||||||||||||
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