2004 ATP Masters Series Singles Singles

| Tournament | Surface | Week | Winner | Finalist | Semifinalists |
|---|---|---|---|---|---|
| Canada (Toronto) | Hard | July 26 | Roger Federer (1) 7–5, 6–3 | Andy Roddick (2) | Thomas Johansson (LL) Nicolas Kiefer |
| Cincinnati | Hard | August 2 | Andre Agassi (11) 6–3, 3–6, 6–2 | Lleyton Hewitt (10) | Tommy Robredo Andy Roddick (2) |
| Madrid | Carpet (i) | October 18 | Marat Safin (3) 6–2, 6–4, 6–3 | David Nalbandian (4) | Ivan Ljubičić Andre Agassi (2) |
| Paris | Carpet (i) | November 1 | Marat Safin (6) 6–3, 7–6(5), 6–3 | Radek Štěpánek (Q) | Max Mirnyi (Q) Guillermo Cañas (13) |
| Houston ( TMC ) | Hard | November 13 | Roger Federer 6–3, 6–2 | Lleyton Hewitt | Andy Roddick Marat Safin |