2003 AAPT Championships – Singles

Tim Henman was the defending champion but did not compete that year.

Nikolay Davydenko won in the final 6–2, 7–6(7–3) against Kristof Vliegen.

Seeds

 * 1)  Wayne Ferreira (first round)
 * 2) 🇧🇾 Max Mirnyi (second round)
 * 3) 🇸🇪 Thomas Enqvist (first round)
 * 4)  Ivan Ljubičić (second round)
 * 5) 🇦🇷 Mariano Zabaleta (quarterfinals)
 * 6) 🇪🇸 Alberto Martín (quarterfinals)
 * 7) 🇧🇪 Olivier Rochus (first round)
 * 8) 🇺🇸 Vince Spadea (second round)