2004 ATP Masters Series Singles Singles

| Tournament | Surface | Week | Winner | Finalist | Semifinalists |
|---|---|---|---|---|---|
| Indian Wells | Hard | March 8 | Roger Federer (1) 6–3, 6–3 | Tim Henman (9) | Andre Agassi (5) Irakli Labadze |
| Miami | Hard | March 22 | Andy Roddick (2) 6–7(2), 6–3, 6–1, retired | Guillermo Coria (3) | Fernando González (21) Vince Spadea |
| Monte Carlo | Clay | April 19 | Guillermo Coria (3) 6–2, 6–1, 6–3 | Rainer Schüttler (4) | Marat Safin Carlos Moyá (5) |
| Rome | Clay | May 3 | Carlos Moyá (6) 6–3, 6–3, 6–1 | David Nalbandian (5) | Albert Costa Mariano Zabaleta |
| Hamburg | Clay | May 10 | Roger Federer (1) 4–6, 6–4, 6–2, 6–3 | Guillermo Coria (2) | Lleyton Hewitt (17) Ivan Ljubičić |