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 informed them that she wished to defect from Communist Czechoslovakia. Within a month, she received a green card and in 1981 became a US citizen. Also, in 1975, Navratilova teamed with then world number one, Chris Evert, to win the French Open women's doubles title, Martina's first major title. They teamed again in 1976 to win the women's Wimbledon doubles title over Billie Jean King and Bette Stove. Navratilova won her first major singles title at Wimbledon in 1978, where she defeated Evert in three sets in the final and captured the world No. 1 ranking for the first time