| Singles | |
|---|---|
| 2003 Delray Beach International Tennis Championships | |
| Champion |  Jan-Michael Gambill |
| Runner-up | Mardy Fish |
| Score | 6–0, 7–6(7–5) |
| Draw | 32 |
| Seeds | 8 |
Davide Sanguinetti was the defending champion but did not compete that year.
Jan-Michael Gambill won in the final 6–0, 7–6(7–5) against Mardy Fish.
Andy Roddick (first round, retired)
Guillermo Coria (first round)
Marcelo Ríos (semifinals) Jan-Michael Gambill (champion)
Arnaud Clément (first round)
Raemon Sluiter (first round)
Stefan Koubek (first round) Vince Spadea (second round)| Semifinals | Final | ||||||||||||
| Mardy Fish | 6 | 6 | |||||||||||
| WC/3 | Marcelo Ríos | 3 | 4 | ||||||||||
| Mardy Fish | 0 | 65 | |||||||||||
| 4 | Jan-Michael Gambill | 6 | 77 | ||||||||||
| 4 | Jan-Michael Gambill | 6 | 2 | 77 | |||||||||
| Q | Robert Kendrick | 3 | 6 | 65 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | A Roddick | 64 | 3r | ||||||||||||||||||||||||
| M Fish | 77 | 4 | M Fish | 6 | 77 | ||||||||||||||||||||||
 F Meligeni | 6 | 6 | F Meligeni | 2 | 64 | ||||||||||||||||||||||
 A Sávolt | 3 | 4 | M Fish | 6 | 6 | ||||||||||||||||||||||
 A Martín | 6 | 3 | 6 | A Martín | 3 | 3 | |||||||||||||||||||||
| B Vahaly | 4 | 6 | 3 | A Martín | 6 | 6 | |||||||||||||||||||||
 I Labadze | 78 | 7 | I Labadze | 4 | 2 | ||||||||||||||||||||||
| 6 | R Sluiter | 66 | 5 | M Fish | 6 | 6 | |||||||||||||||||||||
| WC/3 | M Ríos | 6 | 6 | WC/3 | M Ríos | 3 | 4 | ||||||||||||||||||||
| J Morrison | 3 | 3 | WC/3 | M Ríos | 2 | 6 | 7 | ||||||||||||||||||||
| M Verkerk | 77 | 6 | M Verkerk | 6 | 4 | 5 | |||||||||||||||||||||
| Q | R Mello | 65 | 4 | WC/3 | M Ríos | 6 | 6 | ||||||||||||||||||||
| A Sá | 5 | 2 |  H-T Lee | 3 | 4 | ||||||||||||||||||||||
| H-T Lee | 7 | 6 | H-T Lee | 6 | 6 | ||||||||||||||||||||||
 M Kratochvil | 6 | 77 | M Kratochvil | 2 | 3 | ||||||||||||||||||||||
| 5 | A Clément | 3 | 65 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | V Spadea | 6 | 6 | ||||||||||||||||||||||||
| Q | M Llodra | 3 | 0 | 8 | V Spadea | 4 | 6 | 4 | |||||||||||||||||||
| F Saretta | 6 | 6 | F Saretta | 6 | 3 | 6 | |||||||||||||||||||||
| Q | P Goldstein | 4 | 4 | F Saretta | 6 | 63 | 0 | ||||||||||||||||||||
| WC | J Gimelstob | 6 | 6 | 4 | J-M Gambill | 4 | 77 | 6 | |||||||||||||||||||
| LL | A Bogomolov, Jr. | 4 | 0 | WC | J Gimelstob | 5 | 5 | ||||||||||||||||||||
 N Kiefer | 2 | 4 | 4 | J-M Gambill | 7 | 7 | |||||||||||||||||||||
| 4 | J-M Gambill | 6 | 6 | 4 | J-M Gambill | 6 | 2 | 77 | |||||||||||||||||||
| 7 | S Koubek | 4 | 4 | Q | R Kendrick | 3 | 6 | 65 | |||||||||||||||||||
| Q | R Kendrick | 6 | 6 | Q | R Kendrick | 7 | 7 | ||||||||||||||||||||
 J-R Lisnard | 6 | 4 | 6 | J-R Lisnard | 5 | 5 | |||||||||||||||||||||
| L Burgsmüller | 2 | 6 | 2 | Q | R Kendrick | 6 | 6 | ||||||||||||||||||||
 V Voltchkov | 6 | 6 | V Voltchkov | 0 | 4 | ||||||||||||||||||||||
| WC | A Kim | 4 | 4 | V Voltchkov | 5 | 6 | 1 | ||||||||||||||||||||
 S Sargsian | 7 | 6 | S Sargsian | 7 | 4 | 0r | |||||||||||||||||||||
| 2 | G Coria | 5 | 2 | ||||||||||||||||||||||||
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