| Details | |
|---|---|
| Duration | March 5 – November 9 |
| Edition | 9th |
| Tournaments | 9 |
| Achievements (singles) | |
| Most titles |  Marcelo Ríos (3) |
| Most finals | Marcelo Ríos (3) |
← 1997 1999 → | |
The 1998 ATP Super 9 (also known as Mercedes-Benz Super 9 for sponsorship reasons) were part of the 1998 ATP Tour, the elite tour for professional men's tennis organised by the Association of Tennis Professionals.
| Masters | Singles champions | Runners-up | Score | Doubles champions | Runners-up | Score |
|---|---|---|---|---|---|---|
| Indian Wells Singles – Doubles | Marcelo Ríos |  Greg Rusedski | 6–3, 6–7(15–17), 7–6(7–4), 6–4 |  Jonas Björkman* |  Todd Martin Richey Reneberg | 6–0, 6–3 |
 Patrick Rafter | ||||||
| Miami Singles – Doubles | Marcelo Ríos | Andre Agassi | 7–5, 6–3, 6–4 |  Ellis Ferreira Rick Leach | Alex O'Brien Jonathan Stark | 6–2, 6–4 |
| Monte Carlo Singles – Doubles |  Carlos Moyà* |  Cédric Pioline | 6–3, 6–0, 7–5 |  Jacco Eltingh Paul Haarhuis | Todd Woodbridge Mark Woodforde | 6–4, 6–2 |
| Hamburg Singles – Doubles | Albert Costa* | Àlex Corretja | 6–2, 6–0, 1–0 ret. | Donald Johnson Francisco Montana | David Adams  Brett Steven | 6–4, 6–4 |
| Rome Singles – Doubles | Marcelo Ríos | Albert Costa | W/O |  Mahesh Bhupathi Leander Paes | Ellis Ferreira Rick Leach | 6–4, 4–6, 7–6 |
| Toronto Singles – Doubles | Patrick Rafter* | Richard Krajicek | 7–6(7–3), 6–4 |  Martin Damm* | Ellis Ferreira Rick Leach | 6–7, 6–2 7–6 |
| Jim Grabb | ||||||
| Cincinnati Singles – Doubles | Patrick Rafter | Pete Sampras | 1–6, 7–6(7–2), 6–4 |  Mark Knowles  Daniel Nestor | Olivier Delaître Fabrice Santoro | 6–7, 6–4, 6–4 |
| Stuttgart Singles – Doubles | Richard Krajicek* |  Yevgeny Kafelnikov | 6–4, 6–3, 6–3 | Sébastien Lareau Alex O'Brien | Mahesh Bhupathi Leander Paes | 4–6, 6–3, 7–5 |
| Paris Singles – Doubles | Greg Rusedski* | Pete Sampras | 6–4, 7–6(7–4), 6–3 | Mahesh Bhupathi Leander Paes | Jacco Eltingh Paul Haarhuis | 7–6, 7–6 |
| # | Player | IN | MI | MO | HA | RO | CA | CI | ST | PA | # | Winning span |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Andre Agassi | - | 3 | - | - | - | 3 | 2 | - | 1 | 9 | 1990–1996 (7) | |
| Pete Sampras | 2 | 2 | - | - | 1 | - | 2 | - | 2 | 9 | 1992–1997 (6) | |
 Thomas Muster | - | 1 | 3 | - | 3 | - | - | 1 | - | 8 | 1990–1997 (8) | |
| Michael Chang | 3 | 1 | - | - | - | 1 | 2 | - | - | 7 | 1990–1997 (8) | |
| Jim Courier | 2 | 1 | - | - | 2 | - | - | - | - | 5 | 1991–1993 (3) | |
 Boris Becker | - | - | - | - | - | - | - | 4 | 1 | 5 | 1990–1996 (7) | |
| Stefan Edberg | 1 | - | - | 1 | - | - | 1 | - | 1 | 4 | 1990–1992 (3) | |
 Andrei Medvedev | - | - | 1 | 3 | - | - | - | - | - | 4 | 1994–1997 (4) | |
| Marcelo Ríos | 1 | 1 | 1 | - | 1 | - | - | - | - | 4 | 1997–1998 (2) | |
| Sergi Bruguera | - | - | 2 | - | - | - | - | - | - | 2 | 1991–1993 (3) | |
| Andrei Chesnokov | - | - | 1 | - | - | 1 | - | - | - | 2 | 1990–1991 (2) | |
| Guy Forget | - | - | - | - | - | - | 1 | - | 1 | 2 | 1991 | |
 Goran Ivanišević | - | - | - | - | - | - | - | 1 | 1 | 2 | 1992–1993 (2) | |
| Patrick Rafter | - | - | - | - | - | 1 | 1 | - | - | 2 | 1998 | |
| Michael Stich | - | - | - | 1 | - | - | - | 1 | - | 2 | 1993 | |
| Juan Aguilera | - | - | - | 1 | - | - | - | - | - | 1 | 1990 | |
| Àlex Corretja | - | - | - | - | 1 | - | - | - | - | 1 | 1997 | |
| Albert Costa | - | - | - | 1 | - | - | - | - | - | 1 | 1998 | |
| Roberto Carretero | - | - | - | 1 | - | - | - | - | - | 1 | 1996 | |
| Thomas Enqvist | - | - | - | - | - | - | - | - | 1 | 1 | 1996 | |
| Wayne Ferreira | - | - | - | - | - | 1 | - | - | - | 1 | 1996 | |
| Petr Korda | - | - | - | - | - | - | - | 1 | - | 1 | 1997 | |
| Richard Krajicek | - | - | - | - | - | - | - | 1 | - | 1 | 1998 | |
| Carlos Moyá | - | - | 1 | - | - | 1 | - | - | - | 1 | 1998 | |
| Karel Nováček | - | - | - | 1 | - | - | - | - | - | 1 | 1991 | |
| Mikael Pernfors | - | - | - | - | - | 1 | - | - | - | 1 | 1993 | |
| Greg Rusedski | - | - | - | - | - | - | - | - | 1 | 1 | 1998 | |
| Emilio Sánchez | - | - | - | - | 1 | - | - | - | - | 1 | 1991 | |
| Chris Woodruff | - | - | - | - | - | 1 | - | - | - | 1 | 1997 | |
| # | Player | IN | MI | MO | HA | RO | CA | CI | ST | PA | # | Winning span |