The 2003 Davidoff Swiss Indoors was a men's tennis tournament played on indoor carpet courts at the St. Jakobshalle in Basel in Switzerland and was part of the International Series of the 2003 ATP Tour. The tournament ran from 20 October through 26 October 2003. Unseeded Guillermo Coria won the singles title.
See main article: 2003 Davidoff Swiss Indoors – Singles. Guillermo Coria defeated David Nalbandian by walkover
See main article: 2003 Davidoff Swiss Indoors – Doubles. Mark Knowles / Daniel Nestor defeated Lucas Arnold / Mariano Hood 6–4, 6–2