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The 2005 Chennai Open was an ATP tennis tournament held in Chennai, India. The tournament was held from 3 to 10 January.
Finals
Singles
Template:Main Template:Flagicon Carlos Moyà defeated Template:Flagicon Paradorn Srichaphan 3–6, 6–4, 7–6(7–5)
- It was Moyà's only title of the year and the 18th of his career.
Doubles
Template:Main Template:Flagicon Rainer Schüttler/ Template:Flagicon Yen-Hsun Lu defeated Template:Flagicon Mahesh Bhupathi / Template:Flagicon Jonas Björkman 7–5, 4–6, 7–6(7–4)
- It was Schüttler's only title of the year and the 6th of his career. It was Lu's only title of the year and the 1st of his career.