Thomas Enqvist was the defending champion but lost in the first round to Raemon Sluiter.
Roger Federer won in the final 6–2, 7–6(8–6) against Jonas Björkman.
Seeds
Roger Federer (champion) Jiří Novák (first round) Sébastien Grosjean (second round) Rainer Schüttler (withdrew because of an elbow injury) Younes El Aynaoui (first round) Yevgeny Kafelnikov (first round) Fabrice Santoro (first round) Tommy Robredo (first round)
Draw
Finals
Top half
Bottom half
External links 2003 Open 13 Singles draw 2003 Open 13 Qualifying draw