2003 If Stockholm Open – Singles

Paradorn Srichaphan was the defending champion but lost in the first round to John van Lottum.

Mardy Fish won in the final 7–5, 3–6, 7–6(7–4) against Robin Söderling.

Seeds

 * 1) 🇹🇭 Paradorn Srichaphan (first round)
 * 2)  Sjeng Schalken (first round)
 * 3)  Nicolás Massú (first round)
 * 4)  Fernando González (second round)
 * 5) 🇺🇸 Mardy Fish (champion)
 * 6) 🇦🇷 Mariano Zabaleta (first round)
 * 7)  Wayne Ferreira (first round)
 * 8) 🇫🇮 Jarkko Nieminen (first round)