2003 Tennis Masters Series Singles Singles

| Tournament | Surface | Week | Winner | Finalist | Semifinalists |
|---|---|---|---|---|---|
| Canada (Montréal) | Hard | August 4 | Andy Roddick (6) 6–1, 6–3 | David Nalbandian | Rainer Schüttler (8) Roger Federer (3) |
| Cincinnati | Hard | August 11 | Andy Roddick (7) 4–6, 7–6(3), 7–6(4) | Mardy Fish | Max Mirnyi Rainer Schüttler (8) |
| Madrid | Hard (i) | October 13 | Juan Carlos Ferrero (1) 6–3, 6–4, 6–3 | Nicolas Massú | Roger Federer (3) Younes El Aynaoui (15) |
| Paris | Carpet (i) | October 27 | Tim Henman 6–2, 7–6(6), 7–6(2) | Andrei Pavel | Jiří Novák (14) Andy Roddick (2) |
| Houston ( TMC ) | Hard | November 8 | Roger Federer 6–3, 6–0, 6–4 | Andre Agassi | Rainer Schüttler Andy Roddick |