The 2007 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 106th edition of the Cincinnati Masters, and was part of the ATP Masters Series of the 2007 ATP Tour, and of the Tier III Series of the 2007 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 August 11 through August 19, 2007, and the women from July 14 through July 22, 2007.