The 2003 Synsam Swedish Open was a men's tennis tournament played on outdoor clay courts in Båstad in Sweden and was part of the International Series of the 2003 ATP Tour. It was the 56th edition of the tournament and ran from July 7 through July 13, 2003. Mariano Zabaleta won the singles title.
Mariano Zabaleta defeated Nicolás Lapentti 6–3, 6–4
- It was Zabaleta's only title of the year and the 2nd of his career.
Simon Aspelin / Massimo Bertolini defeated Lucas Arnold / Mariano Hood 6–7(3–7), 6–0, 6–4
- It was Aspelin's 2nd title of the year and the 3rd of his career. It was Bertolini's only title of the year and the 2nd of his career.