linguistic:paraphrasing
Rivalry with Steffi Graf

In 1986 at the US Open, in the most anticipated match of the tournament, Navratilova prevailed over 17-year-old German Steffi Graf in the semifinals 6–1, 6–7, 7–6, saving three match points in an epic spread over two days. She then handily won the final over Helena Suková 6–3, 6–2. Navratilova, with partner Pam Shriver, also won the women's doubles title. Navratilova also defeated Graf in straight sets at the WTA Tour Championship and with an 89–3 record, earned the number-one ranking for the fifth consecutive year.

Graf dominated the first half of the 1987 season including defeating Navratilova in straight sets in the semi-finals of the Miami Open and in the final of the French Open, 6–4, 4–6, 8–6. However, Navratilova defeated Graf in straight sets in the finals of both Wimbledon and the US Open (and at the US Open became only the third player in the Open Era, joining tennis legends Margaret Court and Billie Jean King, to win the women's singles, women's doubles, and mixed doubles at the same event—the rare " Triple Crown "). Navratilova reached all four Grand Slam finals in 1987, winning two of them (she lost the Australian Open to Hana Mandlíková). Graf's two losses to Navratilova were her only losses of the year and with 11 tournament wins over the year versus 4 for Navratilova she was able to obtain year-end world No. 1 ranking ahead of Navratilova at No. 2. Graf eventually broke Navratilova's records of 156 consecutive weeks and 331 total weeks as the world No. 1 singles player but fell 60 short of Navratilova's record of 167 singles titles. Including doubles, Navratilova won almost three times as many titles as Graf with a record doubles/mixed/singles combined total of 344 titles to Graf's 118.

In 1988, Graf won all four major singles titles, beating the 31-year-old Navratilova 5–7, 6–2, 6–1 in the Wimbledon final, their only match of the year, recovering from a set and a break down. Navratilova did not reach the finals of any of the other Grand Slam events but did win nine tournaments enabling her to claim the No. 2 ranking behind Graf.

In 1989, Graf and Navratilova met in the finals of both Wimbledon and the US Open, with Graf winning both encounters 6–1 in the third set. Graf also defeated Navratilova in the finals of the WTA Tour Championships their third and final match of the year. Navratilova, who skipped the French Open that year, did win eight titles and was able to capture the No. 2 ranking behind Graf for the third straight year. Despite the 13 year age difference between the two players, and Graf's comparative lack of investment in doubles and mixed doubles, Navratilova won 9 of the 18 career singles matches with Graf and 5 of the 9 major singles matches with her. At age 34, Navratilova defeated Graf the last time they played in a major in the semifinals of the 1991 US Open 7–6, 6–7, 6–4, to end their Grand Slam rivalry 5–4 up, although it is noteworthy 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.