2003 TD Waterhouse Cup – Singles

Paradorn Srichaphan was the defending champion and won in the final 6–2, 6–4 against James Blake.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.


 * 1) 🇹🇭 Paradorn Srichaphan (champion)
 * 2) 🇧🇷 Gustavo Kuerten (quarterfinals)
 * 3) 🇪🇸 Tommy Robredo (second round)
 * 4)  Fernando González (first round)
 * 5) 🇪🇸 Félix Mantilla (first round)
 * 6) 🇦🇷 Agustín Calleri (second round)
 * 7) 🇲🇦 Younes El Aynaoui (semifinals)
 * 8) 🇪🇸 Albert Costa (first round)