The 2004 Chennai Open was a tennis tournament played on outdoor hard courts at the SDAT Tennis Stadium in Chennai in India and was part of the International Series of the 2004 ATP Tour. The tournament ran from January 5 through January 11, 2004.
Carlos Moyá defeated Paradorn Srichaphan 6–4, 3–6, 7–6(7–5)
- It was Moyá's 1st title of the year and the 14th of his career.
Rafael Nadal / Tommy Robredo defeated Jonathan Erlich / Andy Ram 7–6(7–3), 4–6, 6–3
- It was Nadal's 1st title of the year and the 2nd of his career. It was Robredo's 1st title of the year and the 2nd of his career.