| Singles | |
|---|---|
| 2003 If Stockholm Open | |
| Champion |  Mardy Fish |
| Runner-up |  Robin Söderling |
| Final score | 7–5, 3–6, 7–6(7–4) |
| Draw | 32 |
| Seeds | 8 |
Paradorn Srichaphan was the defending champion but lost in the first round to John van Lottum.
Mardy Fish won in the final 7–5, 3–6, 7–6(7–4) against Robin Söderling.
Paradorn Srichaphan (first round)
Sjeng Schalken (first round)
Nicolás Massú (first round) Fernando González (second round) Mardy Fish (champion)
Mariano Zabaleta (first round)
Wayne Ferreira (first round)
Jarkko Nieminen (first round)| Semifinals | Final | ||||||||||||
| WC | Robin Söderling | 77 | 77 | ||||||||||
 Davide Sanguinetti | 62 | 65 | |||||||||||
| WC | Robin Söderling | 5 | 6 | 64 | |||||||||
| 5 | Mardy Fish | 7 | 3 | 77 | |||||||||
| 5 | Mardy Fish | 6 | 7 | ||||||||||
| WC | Thomas Enqvist | 4 | 5 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | P Srichaphan | 5 | 1 | ||||||||||||||||||||||||
| J van Lottum | 7 | 6 | J van Lottum | 1 | 4 | ||||||||||||||||||||||
| A Vinciguerra | 6 | 2 | 1 | J Björkman | 6 | 6 | |||||||||||||||||||||
| J Björkman | 4 | 6 | 6 | J Björkman | 4 | 3 | |||||||||||||||||||||
| W Moodie | 6 | 3 | 3 | WC | R Söderling | 6 | 6 | ||||||||||||||||||||
| WC | R Söderling | 4 | 6 | 6 | WC | R Söderling | 6 | 6 | |||||||||||||||||||
| J I Chela | 6 | 6 | J I Chela | 4 | 3 | ||||||||||||||||||||||
| 7 | W Ferreira | 4 | 2 | WC | R Söderling | 77 | 77 | ||||||||||||||||||||
| 4 | F González | 3 | 6 | 6 | D Sanguinetti | 62 | 65 | ||||||||||||||||||||
 K Beck | 6 | 1 | 1 | 4 | F González | 6 | 4 | 5 | |||||||||||||||||||
| WC | J Johansson | 7 | 6 | WC | J Johansson | 4 | 6 | 7 | |||||||||||||||||||
| Q |  J F Andersen | 5 | 3 | WC | J Johansson | 3 | 2 | ||||||||||||||||||||
| D Sanguinetti | 5 | D Sanguinetti | 6 | 6 | |||||||||||||||||||||||
| J-M Gambill | 4 | r | D Sanguinetti | 6 | 2 | 7 | |||||||||||||||||||||
 G Carraz | 77 | 5 | 6 | G Carraz | 3 | 6 | 5 | ||||||||||||||||||||
| 8 | J Nieminen | 65 | 7 | 2 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | M Fish | 6 | 77 | ||||||||||||||||||||||||
| Q |  P Baccanello | 4 | 64 | 5 | M Fish | 6 | 6 | ||||||||||||||||||||
 J Melzer | 1 | 1 | Q | J Benneteau | 4 | 4 | |||||||||||||||||||||
| Q | J Benneteau | 6 | 6 | 5 | M Fish | 6 | 67 | 77 | |||||||||||||||||||
 M Ančić | 6 | 6 | M Ančić | 4 | 79 | 64 | |||||||||||||||||||||
| I Karlović | 3 | 2 | M Ančić | 67 | 6 | 77 | |||||||||||||||||||||
| R Sluiter | 6 | 3 | 7 | R Sluiter | 79 | 4 | 63 | ||||||||||||||||||||
| 3 | N Massú | 3 | 6 | 5 | 5 | M Fish | 6 | 7 | |||||||||||||||||||
| 6 | M Zabaleta | 2 | 4 | WC | T Enqvist | 4 | 5 | ||||||||||||||||||||
 K Carlsen | 6 | K Carlsen | 77 | 4 | 4 | ||||||||||||||||||||||
 H Arazi | 5 | 3 | WC | T Enqvist | 64 | 6 | 6 | ||||||||||||||||||||
| WC | T Enqvist | 7 | 6 | WC | T Enqvist | 6 | 6 | ||||||||||||||||||||
| Q |  K Vliegen | 1 | 3 | R Ginepri | 3 | 4 | |||||||||||||||||||||
| R Ginepri | 6 | 6 | R Ginepri | 62 | 79 | 6 | |||||||||||||||||||||
| T Dent | 6 | 7 | T Dent | 77 | 67 | 4 | |||||||||||||||||||||
| 2 | S Schalken | 3 | 5 | ||||||||||||||||||||||||
Roger Federer defeated Lleyton Hewitt in the final, 6–0, 7–6(7–3), 6–0 to win the men's singles tennis title at the 2004 US Open. It was his first US Open title and his fourth Major title overall. With the win, he became the tenth man to win three Majors in a calendar year.
Defending champion Roger Federer successfully defended his title, defeating Andy Roddick in the final, 4–6, 7–5, 7–6(7–3), 6–4 to win the gentlemen's singles tennis title at the 2004 Wimbledon Championships. It was his second Wimbledon title and his third major title overall. This tournament marked the beginning of Federer's record streak of 23 consecutive major semifinals and 36 consecutive major quarterfinals.
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Paradorn Srichaphan was the defending champion but lost in the final 6–4, 3–6, 7–6(7–5) against Carlos Moyá.
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Lleyton Hewitt was the defending champion but lost in the quarterfinals to Sébastien Grosjean.
Sjeng Schalken was the defending champion but lost in the first round to Taylor Dent.
Greg Rusedski was the defending champion but lost in the second round to Scott Draper.
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Andy Roddick was the defending champion, but withdrew due to an Abdominal strain.
Andy Roddick was the defending champion, but lost in the quarterfinals.
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