The 2004 Chennai Open was a men's tennis tournament played on outdoor hard courts at the SDAT Tennis Stadium in Chennai in India, part of the International Series of the 2004 ATP Tour. It ran from 5 January through 11 January 2004. First-seeded Carlos Moyá won the singles title while Rafael Nadal and Tommy Robredo took the doubles.
See main article: 2004 Chennai Open – Singles. Carlos Moyá defeated Paradorn Srichaphan 6–4, 3–6, 7–6(7–5)
See main article: 2004 Chennai Open – Doubles. Rafael Nadal / Tommy Robredo defeated Jonathan Erlich / Andy Ram 7–6(7–3), 4–6, 6–3