The 1999 Great American Insurance ATP Championships, also known as the Cincinnati Open, was a men's tennis tournament played on outdoor Clay courts. It was the 98th edition of the tournament previously known as the Thriftway ATP Championships, and was part of the ATP Super 9 of the 1999 ATP Tour. It took place in Mason, Ohio, USA, from August 9 through August 16, 1999. The singles title was won by first-seeded Pete Sampras.[1]
The tournament had previously appeared on the Tier III of the WTA Tour but no event was held from 1989 to 2003.
See main article: 1999 Great American Insurance ATP Championships – Singles. Pete Sampras defeated Patrick Rafter, 7–6(9–7), 6–3
See main article: 1999 Great American Insurance ATP Championships – Doubles. Jonas Björkman / Byron Black defeated Todd Woodbridge / Mark Woodforde 6–3, 7–6(8–6)