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.[3]
The tournament had previously appeared on the
Tier III of the
WTA Tour but no event was held from 1989 to 2003.
It was Pete Sampras' 4th title of the year and his 60th overall. It was his 1st Masters title of the year and his 10th overall. It was his 2nd title at the event after winning in
1992 and
1997.