The 2003 International Raiffeisen Grand Prix was a men's tennis tournament played on outdoor clay courts in Sankt Pölten, Austria and was part of the International Series of the 2003 ATP Tour. It was the 23rd edition of the tournament and was held from 19 May through 25 May 2003. First-seeded Andy Roddick won the singles title.
See main article: 2003 International Raiffeisen Grand Prix – Singles. Andy Roddick defeated Nikolay Davydenko 6–3, 6–2
See main article: 2003 International Raiffeisen Grand Prix – Doubles. Simon Aspelin / Massimo Bertolini defeated Sargis Sargsian / Nenad Zimonjić 6–4, 6–7(8–10), 6–3