The 2003 Brasil Open was a men's tennis tournament played on outdoor hard courts in Costa do Sauipe resort, Mata de São João, in Brazil and was part of the International Series of the 2003 ATP Tour. It was the third edition of the tournament and ran from September 8 through September 14, 2003. Sjeng Schalken won the singles title.
See main article: 2003 Brasil Open – Singles. Sjeng Schalken defeated Rainer Schüttler 6–2, 6–4
See main article: 2003 Brasil Open – Doubles. Todd Perry / Thomas Shimada defeated Scott Humphries / Mark Merklein 6–2, 6–4