2003 Delray Beach International Tennis Championships – Singles

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.

Seeds

 * 1) 🇺🇸 Andy Roddick (first round, retired)
 * 2) 🇦🇷 Guillermo Coria (first round)
 * 3)  Marcelo Ríos (semifinals)
 * 4) 🇺🇸 Jan-Michael Gambill (champion)
 * 5) 🇫🇷 Arnaud Clément (first round)
 * 6)  Raemon Sluiter (first round)
 * 7) 🇦🇹 Stefan Koubek (first round)
 * 8) 🇺🇸 Vince Spadea (second round)