2004 Cincinnati Masters
| 2004 Western & Southern Financial Group Masters and Western & Southern Financial Group Women's Open |
|
|---|---|
| Date | 2–8 August (men) 16–22 August (women) |
| Edition | 103rd |
| Surface | Hard / Outdoor |
| Location | Mason, United States |
| Venue | Lindner Family Tennis Center |
| Champions | |
| Men's Singles | |
 Andre Agassi
|
|
| Women's Singles | |
|
Lindsay Davenport
|
|
| Men's Doubles | |
 Mark Knowles /  Daniel Nestor
|
|
| Women's Doubles | |
|
Jill Craybas / Marlene Weingärtner
|
|
The 2004 Cincinnati Masters (also known as the Western & Southern Financial Group Masters and Western & Southern Financial Group Women's Open for sponsorship reasons) was a tennis tournament played on outdoor hard courts. It was the 103rd edition of the Cincinnati Masters, and was part of the ATP Masters Series of the 2004 ATP Tour, and of the Tier III Series of the 2004 WTA Tour. Both the men's and the women's events took place at the Lindner Family Tennis Center in Mason, near Cincinnati, Ohio, United States. It was the first Cincinnati event to feature both men and women's draws since 1989.
Andre Agassi defeated 
Lleyton Hewitt, 6–3, 3–6, 6–2
...
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