Martina Navratilova age 34, Navratilova defeated Graf the last time they played in a major in the semifinals of the 1991 US Open 7–6(2), 6–7(6), 6–4, to end their Grand Slam rivalry 5-4 up. It is worthy to note that all 4 of Graf's Grand Slam victories over Navratilova came in the finals of a Slam. This is reflected in the Grand Slams Finals chart below. Navratilova's final major singles triumph was in 1990. In the final, the 33-year-old Navratilova swept Zina Garrison 6–4, 6–1 to claim an all-time record ninth Wimbledon singles crown. Though that was her last major singles title,
Martina Navratilova in September 1982, an acute attack of toxoplasmosis "contributed to Martina Navratilova's defeat during the United States Open tennis tournament", in which No. 1 seed Navratilova unexpectedly lost to No. 7 seed Pam Shriver in the quarterfinal round. (Shriver—Navratilova's doubles partner in the same tournament—subsequently lost to No. 5 seed Hana Mandlíková in the semifinal. Mandlíková was then defeated in the final by Navratilova's longtime rival, No. 2 seed Chris Evert.) By late October, Navratilova had "apparently recovered". On April 7, 2010, Navratilova announced that she was being treated for breast cancer. A routine mammogram in January 2010 revealed that