2004 Western & Southern Financial Group Masters – Doubles

Bob and Mike Bryan were the defending champions, but lost in second round to Jonathan Erlich and Andy Ram.

Mark Knowles and Daniel Nestor won the title, defeating Jonas Björkman and Todd Woodbridge 6–2, 3–6, 6–3 in the final.

Seeds
All seeds received a bye into the second round. • # 🇸🇪 Jonas Björkman / 🇦🇺 Todd Woodbridge (final)

• # 🇺🇸 Bob Bryan / 🇺🇸 Mike Bryan (second round)

• # Mark Knowles / 🇨🇦 Daniel Nestor (champions)

• # 🇫🇷 Michaël Llodra / 🇫🇷 Fabrice Santoro (quarterfinals)

• # Wayne Black / Kevin Ullyett (second round)

• # 🇦🇺 Wayne Arthurs / 🇦🇺 Paul Hanley (second round)

• # 🇨🇿 Martin Damm / 🇨🇿 Cyril Suk (second round)

• # 🇮🇳 Mahesh Bhupathi / 🇮🇳 Leander Paes (quarterfinals)