In 1990, an abdominal muscle injury forced Edberg to retire from the Australian Open final while trailing Ivan Lendl 5–2 (including two breaks of serve) in the third set. Edberg nevertheless took the world No. 1 ranking from Lendl on 13 August 1990 by winning the Super 9 tournament in Cincinnati. He held it for the rest of that year and for much of 1991 and 1992. Edberg spent a total of 72 weeks as World No. 1. In 1991, Edberg again reached the semifinals of Wimbledon but lost to Michael Stich in a close match: 6–4, 6–7, 6–7, 6–7.