| 2008 Western & Southern Financial Group Masters and Western & Southern Financial Group Women's Open | |
|---|---|
| Date | July 26 – August 3 (men) August 9–17 (women) |
| Edition | 107th |
| Surface | Hard / Outdoor |
| Location | Mason, United States |
| Venue | Lindner Family Tennis Center |
| Champions | |
| Men's singles | |
 Andy Murray | |
| Women's singles | |
 Nadia Petrova | |
| Men's doubles | |
 Bob Bryan / Mike Bryan | |
| Women's doubles | |
| Maria Kirilenko / Nadia Petrova | |
The 2008 Cincinnati Masters (also known as the Western & Southern Financial Group Masters and Women's Open for sponsorship reasons) was a tennis tournament played on outdoor hard courts. It was the 107th edition of the Cincinnati Masters, and was part of the ATP Masters Series of the 2008 ATP Tour, and of the Tier III Series of the 2008 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, with the men playing from July 26 through August 3, 2008, and the women from August 9 through August 17, 2008.
The men's field was led by World No. 1, French Open and Wimbledon runner-up and Cincinnati Masters defending champion Roger Federer, ATP No. 2, French Open, Wimbledon and Canada Masters winner Rafael Nadal, and Australian Open titlist Novak Djokovic. Other top seeded players were ATP No. 4, Pörtschach and Warsaw titlist Nikolay Davydenko, Valencia and s'Hertogenbosch winner David Ferrer, Andy Roddick, James Blake and Andy Murray.
The women's draw featured Paris, Eastbourne and Montreal semifinalist, Standford finalist Marion Bartoli, Eastbourne runner-up and Wimbledon quarterfinalist Nadia Petrova, and Estoril, Barcelona winner Maria Kirilenko. Also competing were Strasbourg finalist, French Open and Wimbledon mixed doubles runner-up Katarina Srebotnik, Amelia Island quarterfinalist Amélie Mauresmo, Aleksandra Wozniak, Ekaterina Makarova and Tamira Paszek.
Finals
Men's singles
Andy Murray defeated 
Novak Djokovic 7–6(7–4), 7–6(7–5)
- It was Andy Murray's 3rd title of the year, and his 6th overall. It was his 1st career Masters title.
Women's singles
Nadia Petrova defeated 
Nathalie Dechy 6–2, 6–1
- It was Nadia Petrova's 1st title of the year, and her 8th overall.
Men's doubles
Bob Bryan / Mike Bryan defeated 
Jonathan Erlich / Andy Ram 4–6, 7–6(7–2), [10–7]
Women's doubles
Maria Kirilenko / Nadia Petrova defeated 
Su-wei Hsieh / Yaroslava Shvedova 6–3, 4–6, [10–8]