# 2003 U.S. Men's Clay Court Championships – Singles

Andy Roddick was the defending champion but lost in the final 3–6, 6–3, 6–4 against Andre Agassi.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Andre Agassi (champion)
* Andy Roddick (final)
* James Blake (quarterfinals)
* Taylor Dent (first round)
* Vince Spadea (second round)
* Jan-Michael Gambill (first round)
* Robby Ginepri (withdrew because of a right hand injury)
* Hyung-Taik Lee (first 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
| 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 | Final | Final | Final | Final | Final |
| 1 | A Agassi | 6 | 6 | | | | | | | | | | | | | | | | | | | | | |
| | Ž Krajan | 2 | 0 | | 1 | A Agassi | 6 | 6 | | | | | | | | | | | | | | | | |
| | B Vahaly | 3 | 7$^7$ | 3 | | I Labadze | 2 | 0 | | | | | | | | | | | | | | | | |
| | I Labadze | 6 | 6$^2$ | 6 | | | | | | 1 | A Agassi | 6 | 6 | | | | | | | | | | | |
| | A Sá | 6$^2$ | 0 | | | | | | | Q | R Mello | 0 | 1 | | | | | | | | | | | |
| Q | R Mello | 7$^7$ | 6 | | Q | R Mello | 7$^8$ | 6 | | | | | | | | | | | | | | | | |
| | T Martin | 6 | 6 | | | T Martin | 6$^6$ | 1 | | | | | | | | | | | | | | | | |
| 8 | H-T Lee | 3 | 4 | | | | | | | | | | | | 1 | A Agassi | 6 | 6 | | | | | | |
| 4 | T Dent | 6 | 6$^4$ | 3 | | | | | | | | | | | | J Melzer | 4 | 1 | | | | | | |
| | J Melzer | 4 | 7$^7$ | 6 | | J Melzer | 5 | 6 | 6 | | | | | | | | | | | | | | | |
| WC | T Blake | 6$^5$ | 1 | | | K Carlsen | 7 | 3 | 4 | | | | | | | | | | | | | | | |
| | K Carlsen | 7$^7$ | 6 | | | | | | | | J Melzer | 7 | 2 | 7 | | | | | | | | | | |
| Q | S Roitman | 3 | 3 | | | | | | | | M Fish | 5 | 6 | 5 | | | | | | | | | | |
| | M Fish | 6 | 6 | | | M Fish | 6 | 6 | | | | | | | | | | | | | | | | |
| | L Horna | 6 | 6 | | | L Horna | 2 | 4 | | | | | | | | | | | | | | | | |
| 6 | J-M Gambill | 2 | 4 | | | | | | | | | | | | | | | | | 1 | Andre Agassi | 3 | 6 | 6 |
| LL | C Mamiit | 3 | 1 | | | | | | | | | | | | | | | | | 2 | Andy Roddick | 6 | 3 | 4 |
| | F Saretta | 6 | 6 | | | F Saretta | 2 | 0 | | | | | | | | | | | | | | | | |
| | O Mutis | 6$^1$ | 6 | 6 | | O Mutis | 6 | 6 | | | | | | | | | | | | | | | | |
| WC | H Armando | 7$^7$ | 4 | 1 | | | | | | | O Mutis | 6 | 6$^3$ | 6 | | | | | | | | | | |
| | A Sávolt | 6 | 6 | | | | | | | 3 | J Blake | 4 | 7$^7$ | 1 | | | | | | | | | | |
| | N Kiefer | 3 | 2 | | | A Sávolt | 2 | 6$^2$ | | | | | | | | | | | | | | | | |
| | A Waske | 4 | 4 | | 3 | J Blake | 6 | 7$^7$ | | | | | | | | | | | | | | | | |
| 3 | J Blake | 6 | 6 | | | | | | | | | | | | | O Mutis | 6 | 1 | 2 | | | | | |
| 5 | V Spadea | 6 | 6 | | | | | | | | | | | | 2 | A Roddick | 4 | 6 | 6 | | | | | |
| Q | J Brasington | 3 | 3 | | 5 | V Spadea | 6 | 6$^6$ | 3 | | | | | | | | | | | | | | | |
| | J Gimelstob | 2 | 4 | | | F Meligeni | 4 | 7$^8$ | 6 | | | | | | | | | | | | | | | |
| | F Meligeni | 6 | 6 | | | | | | | | F Meligeni | 3 | 6 | 4 | | | | | | | | | | |
| | T Enqvist | 1 | 6$^7$ | | | | | | | 2 | A Roddick | 6 | 4 | 6 | | | | | | | | | | |
| Q | P Goldstein | 6 | 7$^9$ | | Q | P Goldstein | 5 | 4 | | | | | | | | | | | | | | | | |
| WC | J Morrison | 3 | 1 | | 2 | A Roddick | 7 | 6 | | | | | | | | | | | | | | | | |
| 2 | A Roddick | 6 | 6 | | | | | | | | | | | | | | | | | | | | | |