2003 Thailand Open – Singles

Taylor Dent won in the final 6–3, 7–6(7–5) against Juan Carlos Ferrero.

Seeds

 * 1) 🇪🇸 Juan Carlos Ferrero (final)
 * 2) 🇺🇸 Andy Roddick (withdrew because of a hamstring injury)
 * 3) 🇪🇸 Carlos Moyá (quarterfinals)
 * 4) 🇹🇭 Paradorn Srichaphan (quarterfinals)
 * 5) 🇫🇮 Jarkko Nieminen (semifinals)
 * 6)  Ivan Ljubičić (semifinals)
 * 7) 🇫🇷 Fabrice Santoro (first round)
 * 8) 🇺🇸 Taylor Dent (champion)