See main article: 2003 Swisscom Challenge.
Justine Henin-Hardenne defeated Jelena Dokic in the final, 6–0, 6–4 to win the singles tennis title at the 2003 Swisscom Challenge. With the win, Henin-Hardenne replaced Kim Clijsters as the world No. 1.[1] [2]
Patty Schnyder was the defending champion, but lost in the quarterfinals to Dokic.
The first four seeds received a bye into the second round.