| Singles | |
|---|---|
| 2003 Qatar Open | |
| Champion |  Stefan Koubek |
| Runner-up |  Jan-Michael Gambill |
| Score | 6–4, 6–4 |
| Draw | 32 |
| Seeds | 8 |
Younes El Aynaoui was the defending champion but lost in the semifinals to Stefan Koubek.
Koubek won in the final 6–4, 6–4 against Jan-Michael Gambill.
Roger Federer (quarterfinals)
Albert Costa (second round)
Younes El Aynaoui (semifinals)
Yevgeny Kafelnikov (first round)
Mikhail Youzhny (semifinals)
Nicolas Escudé (first round) Fabrice Santoro (quarterfinals) Jan-Michael Gambill (final)| Semifinals | Final | ||||||||||||
| 9 | Jan-Michael Gambill | 6 | 6 | ||||||||||
| 6 | Mikhail Youzhny | 4 | 2 | ||||||||||
| 9 | Jan-Michael Gambill | 4 | 4 | ||||||||||
| Stefan Koubek | 6 | 6 | |||||||||||
| 3 | Younes El Aynaoui | 61 | 65 | ||||||||||
| Stefan Koubek | 77 | 77 | |||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | R Federer | 6 | 64 | 6 | |||||||||||||||||||||||
| LL | A Stoliarov | 2 | 77 | 4 | 1 | R Federer | 6 | 6 | |||||||||||||||||||
| M Kratochvil | 6 | 6 | M Kratochvil | 4 | 4 | ||||||||||||||||||||||
| WC |  S Khalfan | 0 | 4 | 1 | R Federer | 4 | 5 | ||||||||||||||||||||
 R Sluiter | 3 | 77 | 4 | 9 | J-M Gambill | 6 | 7 | ||||||||||||||||||||
| D Ferrer | 6 | 62 | 6 | D Ferrer | 65 | 4 | |||||||||||||||||||||
| I Heuberger | 1 | 5 | 9 | J-M Gambill | 77 | 6 | |||||||||||||||||||||
| 9 | J-M Gambill | 6 | 7 | 9 | J-M Gambill | 6 | 6 | ||||||||||||||||||||
| 4 | Y Kafelnikov | 2 | 5 | 6 | M Youzhny | 4 | 2 | ||||||||||||||||||||
| F Vicente | 6 | 7 | F Vicente | 7 | 77 | ||||||||||||||||||||||
| Q |  M Hantschk | 77 | 6 | Q | M Hantschk | 5 | 63 | ||||||||||||||||||||
 K Carlsen | 63 | 1 | F Vicente | 67 | 3 | ||||||||||||||||||||||
 R Štěpánek | 64 | 6 | 6 | 6 | M Youzhny | 79 | 6 | ||||||||||||||||||||
| F López | 77 | 3 | 2 | R Štěpánek | 3 | 1 | |||||||||||||||||||||
| D Sánchez | 6 | 4 | 4 | 6 | M Youzhny | 6 | 6 | ||||||||||||||||||||
| 6 | M Youzhny | 4 | 6 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | F Santoro | 6 | 6 | ||||||||||||||||||||||||
| F Mantilla | 3 | 3 | 8 | F Santoro | 7 | 68 | 7 | ||||||||||||||||||||
| WC | Y Allegro | 3 | 2 | Q |  C Rochus | 5 | 710 | 5 | |||||||||||||||||||
| Q | C Rochus | 6 | 6 | 8 | F Santoro | 6 | 3 | 3 | |||||||||||||||||||
| H Arazi | 6 | 6 | 3 | Y El Aynaoui | 3 | 6 | 6 | ||||||||||||||||||||
| Q | D Prinosil | 2 | 3 | H Arazi | 4 | 61 | |||||||||||||||||||||
| J Boutter | 4 | 4 | 3 | Y El Aynaoui | 6 | 77 | |||||||||||||||||||||
| 3 | Y El Aynaoui | 6 | 6 | 3 | Y El Aynaoui | 61 | 65 | ||||||||||||||||||||
| 7 | N Escudé | 65 | 2 | S Koubek | 77 | 77 | |||||||||||||||||||||
| S Koubek | 77 | 6 | S Koubek | 6 | 6 | ||||||||||||||||||||||
 V Voltchkov | 6 | 3 | 7 | V Voltchkov | 1 | 1 | |||||||||||||||||||||
 H-T Lee | 4 | 6 | 5 | S Koubek | 6 | 6 | |||||||||||||||||||||
| Q |  A Vinciguerra | 2 | 6 | 6 | Q | A Vinciguerra | 3 | 4 | |||||||||||||||||||
| WC | K Alami | 6 | 4 | 1 | Q | A Vinciguerra | 3 | 77 | 7 | ||||||||||||||||||
 A Gaudenzi | 3 | 4 | 2 | A Costa | 6 | 65 | 5 | ||||||||||||||||||||
| 2 | A Costa | 6 | 6 | ||||||||||||||||||||||||
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