| Details | |
|---|---|
| Duration | March 10 – November 8 |
| Edition | 15th |
| Tournaments | 9 |
| Achievements (singles) | |
| Most titles |  Roger Federer (3) |
| Most finals |  Guillermo Coria Roger Federer (3) |
← 2003 2005 → | |
The table below shows the 2004 ATP Masters Series schedule.
The ATP Masters Series are part of 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 | Roger Federer |  Tim Henman | 6–3, 6–3 |  Arnaud Clément* Sébastien Grosjean* |  Wayne Black Kevin Ullyett | 6–3, 4–6, 7–5 |
| Miami Singles – Doubles |  Andy Roddick | Guillermo Coria | 6–7(2–7), 6–3, 6–1 ret. | Wayne Black |  Jonas Björkman  Todd Woodbridge | 6–2, 7–6 |
| Kevin Ullyett* | ||||||
| Monte Carlo Singles – Doubles | Guillermo Coria |  Rainer Schüttler | 6–2, 6–1, 6–3 | Tim Henman | Gastón Etlis Martín Rodríguez | 7–5, 6–4 |
 Nenad Zimonjić* | ||||||
| Rome Singles – Doubles |  Carlos Moyà | David Nalbandian | 6–3, 6–3, 6–1 |  Mahesh Bhupathi  Max Mirnyi | Wayne Arthurs Paul Hanley | 1–6, 6–4, 7–6 |
| Hamburg Singles – Doubles | Roger Federer | Guillermo Coria | 4–6, 6–4, 6–2, 6–3 | Wayne Black Kevin Ullyett | Bob Bryan Mike Bryan | 6–1, 6–2 |
| Toronto Singles – Doubles | Roger Federer | Andy Roddick | 7–5, 6–3 | Mahesh Bhupathi Leander Paes | Jonas Björkman Max Mirnyi | 6–4, 6–2 |
| Cincinnati Singles – Doubles | Andre Agassi | Lleyton Hewitt | 6–3, 3–6, 6–2 |  Mark Knowles  Daniel Nestor | Jonas Björkman Todd Woodbridge | 7–6, 6–3 |
| Madrid Singles – Doubles |  Marat Safin | David Nalbandian | 6–2, 6–4, 6–3 | Mark Knowles Daniel Nestor | Bob Bryan Mike Bryan | 6–3, 6–4 |
| Paris Singles – Doubles | Marat Safin |  Radek Štěpánek | 6–3, 7–6(7–5), 6–3 | Jonas Björkman Todd Woodbridge | Wayne Black Kevin Ullyett | 6–3, 6–4 |
| # | Player | IN | MI | MO | HA | RO | CA | CI | ST | PA | # | Winning span |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Andre Agassi | 1 | 6 | - | - | 1 | 3 | 3 | 1 | 2 | 17 | 1990–2004 (15) |
| 2. | Pete Sampras | 2 | 3 | - | - | 1 | - | 3 | - | 2 | 11 | 1992–2000 (9) |
| 3. |  Thomas Muster | - | 1 | 3 | - | 3 | - | - | 1 | - | 8 | 1990–1997 (8) |
| 4. | Michael Chang | 3 | 1 | - | - | - | 1 | 2 | - | - | 7 | 1990–1997 (8) |
| 5. | Jim Courier | 2 | 1 | - | - | 2 | - | - | - | - | 5 | 1991–1993 (3) |
| Boris Becker | - | - | - | - | - | - | - | 4 | 1 | 5 | 1990–1996 (7) | |
 Gustavo Kuerten | - | - | 2 | 1 | 1 | - | 1 | - | - | 5 | 1999–2001 (3) | |
 Marcelo Ríos | 1 | 1 | 1 | 1 | 1 | - | - | - | - | 5 | 1997–1999 (3) | |
| Marat Safin | - | - | - | - | - | 1 | - | 1 | 3 | 5 | 2000–2004 (5) | |
| 10. | Stefan Edberg | 1 | - | - | 1 | - | - | 1 | - | 1 | 4 | 1990–1992 (3) |
| Roger Federer | 1 | - | - | 2 | - | 1 | - | - | - | 4 | 2002–2004 (3) | |
| Juan Carlos Ferrero | - | - | 2 | - | 1 | - | 1 | - | - | 4 | 2001–2003 (3) | |
 Andrei Medvedev | - | - | 1 | 3 | - | - | - | - | - | 4 | 1994–1997 (4) | |
| 14. | Thomas Enqvist | - | - | - | - | - | - | 1 | 1 | 1 | 3 | 1996–2000 (5) |
| Carlos Moyá | - | - | 1 | - | 1 | - | 1 | - | - | 3 | 1998–2004 (7) | |
| Andy Roddick | - | 1 | - | - | - | 1 | 1 | - | - | 3 | 2003–2004 (2) | |
| 17. | Sergi Bruguera | - | - | 2 | - | - | - | - | - | - | 2 | 1991–1993 (3) |
| Andrei Chesnokov | - | - | 1 | - | - | 1 | - | - | - | 2 | 1990–1991 (2) | |
| Guillermo Coria | - | - | 1 | 1 | - | - | - | - | - | 2 | 2003–2004 (2) | |
| Àlex Corretja | 1 | - | - | - | 1 | - | - | - | - | 2 | 1997–2000 (4) | |
 Wayne Ferreira | - | - | - | - | - | 1 | - | 1 | - | 2 | 1996–2000 (5) | |
| Guy Forget | - | - | - | - | - | - | 1 | - | 1 | 2 | 1991 | |
| Lleyton Hewitt | 2 | - | - | - | - | - | - | - | - | 2 | 2002–2003 (2) | |
 Goran Ivanišević | - | - | - | - | - | - | - | 1 | 1 | 2 | 1992–1993 (2) | |
 Richard Krajicek | - | 1 | - | - | - | - | - | 1 | - | 2 | 1998–1999 (2) | |
| Patrick Rafter | - | - | - | - | - | 1 | 1 | - | - | 2 | 1998 | |
| Michael Stich | - | - | - | 1 | - | - | - | 1 | - | 2 | 1993 | |
| Juan Aguilera | - | - | - | 1 | - | - | - | - | - | 1 | 1990 | |
| Guillermo Cañas | - | - | - | - | - | 1 | - | - | - | 1 | 2002 | |
| Albert Costa | - | - | - | 1 | - | - | - | - | - | 1 | 1998 | |
| Roberto Carretero | - | - | - | 1 | - | - | - | - | - | 1 | 1996 | |
| Sébastien Grosjean | - | - | - | - | - | - | - | - | 1 | 1 | 2001 | |
| Tommy Haas | - | - | - | - | - | - | - | 1 | - | 1 | 2001 | |
| Tim Henman | - | - | - | - | - | - | - | - | 1 | 1 | 2003 | |
| Thomas Johansson | - | - | - | - | - | 1 | - | - | - | 1 | 1999 | |
| Petr Korda | - | - | - | - | - | - | - | 1 | - | 1 | 1997 | |
| Felix Mantilla | - | - | - | - | 1 | - | - | - | - | 1 | 2003 | |
| Magnus Norman | - | - | - | - | 1 | - | - | - | - | 1 | 2000 | |
| Karel Nováček | - | - | - | 1 | - | - | - | - | - | 1 | 1991 | |
 Andrei Pavel | - | - | - | - | - | 1 | - | - | - | 1 | 2001 | |
| Mikael Pernfors | - | - | - | - | - | 1 | - | - | - | 1 | 1993 | |
| Mark Philippoussis | 1 | - | - | - | - | - | - | - | - | 1 | 1999 | |
| Cédric Pioline | - | - | 1 | - | - | - | - | - | - | 1 | 2000 | |
| Albert Portas | - | - | - | - | 1 | - | - | - | - | 1 | 2001 | |
| 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 |