# 2004 Allianz Suisse Open Gstaad – Singles

Jiří Novák was the defending champion but lost in the quarterfinals to Potito Starace.
Roger Federer won in the final 6–2, 6–3, 5–7, 6–3 against Igor Andreev.

## Seeds

A champion seed is indicated in bold while text in italics indicates the round in which that seed was eliminated.
* Roger Federer (champion)
* Juan Carlos Ferrero (first round)
* Rainer Schüttler (semifinals)
* Jiří Novák (quarterfinals)
* Andrei Pavel (first round)
* David Ferrer (second round)
* David Sánchez (first round)
* Albert Costa (second round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking
* NB: The Final was the best of 5 sets while all other rounds were the best of 3 sets.

### Final

| Final | Final | Final | Final | Final | Final | Final |
| 1 | Roger Federer | 6 | 6 | 5 | 6 | |
| | Igor Andreev | 2 | 3 | 7 | 3 | |

### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | R Federer | 6 | 6 | | | | | | | | | | | | | | | | |
| | T Behrend | 1 | 1 | | 1 | R Federer | 6$^5$ | 6 | 7$^7$ | | | | | | | | | | |
| | Ó Hernández | 3 | 7$^8$ | 3 | | I Karlović | 7$^7$ | 3 | 6$^4$ | | | | | | | | | | |
| | I Karlović | 6 | 6$^6$ | 6 | | | | | | 1 | R Federer | 6 | 5 | 6 | | | | | |
| WC | I Heuberger | 4 | 6 | 3 | | | | | | | R Štěpánek | 1 | 7 | 4 | | | | | |
| | R Štěpánek | 6 | 1 | 6 | | R Štěpánek | 6 | 1 | 6 | | | | | | | | | | |
| WC | M Rosset | 7$^7$ | 6 | | WC | M Rosset | 4 | 6 | 3 | | | | | | | | | | |
| 5 | A Pavel | 6$^5$ | 4 | | | | | | | | | | | | 1 | R Federer | 6 | 3 | 6 |
| 4 | J Novák | 6 | 6 | | | | | | | | | | | | Q | P Starace | 3 | 6 | 3 |
| | J Acasuso | 3 | 3 | | 4 | J Novák | 3 | 6 | 6 | | | | | | | | | | |
| | A Montañés | 6$^5$ | 7$^7$ | 6 | | A Montañés | 6 | 3 | 3 | | | | | | | | | | |
| Q | M Chiudinelli | 7$^7$ | 6$^2$ | 4 | | | | | | 4 | J Novák | 4 | 3 | | | | | | |
| | L Burgsmüller | 6$^4$ | 2 | | | | | | | Q | P Starace | 6 | 6 | | | | | | |
| | V Hanescu | 7$^7$ | 6 | | | V Hanescu | 6 | 6$^3$ | 6$^1$ | | | | | | | | | | |
| Q | P Starace | 6 | 3 | 6 | Q | P Starace | 3 | 7$^7$ | 7$^7$ | | | | | | | | | | |
| 7 | D Sánchez | 2 | 6 | 3 | | | | | | | | | | | | | | | |

### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | D Ferrer | 2 | 6 | 6 | | | | | | | | | | | | | | |
| | T Berdych | 6 | 3 | 4 | 6 | D Ferrer | 3 | 6$^2$ | | | | | | | | | | |
| | C Rochus | 6 | 2 | 4 | | F Mantilla | 6 | 7$^7$ | | | | | | | | | | |
| | F Mantilla | 3 | 6 | 6 | | | | | | F Mantilla | 1 | 6 | 2 | | | | | |
| | F Mayer | 7 | 6 | | | | | | 3 | R Schüttler | 6 | 4 | 6 | | | | | |
| | A Portas | 5 | 3 | | | F Mayer | 3 | 2 | | | | | | | | | | |
| WC | M Kratochvil | 4 | 6 | 3 | 3 | R Schüttler | 6 | 6 | | | | | | | | | | |
| 3 | R Schüttler | 6 | 1 | 6 | | | | | | | | | | 3 | R Schüttler | 2 | 6 | 6$^6$ |
| 8 | A Costa | 6 | 7$^7$ | | | | | | | | | | | | I Andreev | 6 | 3 | 7$^8$ |
| | B Ulihrach | 4 | 6$^5$ | | 8 | A Costa | 2 | 4 | | | | | | | | | | |
| Q | A Seppi | 6 | 4 | 2 | | I Andreev | 6 | 6 | | | | | | | | | | |
| | I Andreev | 3 | 6 | 6 | | | | | | I Andreev | 6 | 6 | | | | | | |
| Q | S Wawrinka | 6$^5$ | 4 | | | | | | | R Ramírez Hidalgo | 3 | 4 | | | | | | |
| | R Ramírez Hidalgo | 7$^7$ | 6 | | | R Ramírez Hidalgo | 6 | 6 | | | | | | | | | | |
| | S Koubek | 7$^7$ | 6 | | | S Koubek | 3 | 4 | | | | | | | | | | |
| 2 | J C Ferrero | 6$^5$ | 4 | | | | | | | | | | | | | | | |