The 2003 Synsam Swedish Open was a men's tennis tournament played on outdoor clay courts in Båstad, Sweden and was part of the International Series of the 2003 ATP Tour. It was the 56th edition of the tournament and ran from 7 July until 13 July 2003. Fifth-seeded Mariano Zabaleta won the singles title.
See main article: 2003 Synsam Swedish Open – Singles. Mariano Zabaleta defeated Nicolás Lapentti 6–3, 6–4
See main article: 2003 Synsam Swedish Open – Doubles. Simon Aspelin / Massimo Bertolini defeated Lucas Arnold / Mariano Hood 6–7(3–7), 6–0, 6–4