Steffi Graf competed in multiple professional tennis competition.
The Grand Slam tournaments , also called majors , are the four most-important annual tennis events . Steffi Graf . Graf won 22 Grand Slam singles titles . Graf won six French Open singles titles ( second to Evert ) , seven Wimbledon singles titles , four Australian Open titles , and five U.S. Open singles titles . Graf reached thirteen consecutive Grand Slam singles finals , from the 1987 French Open through to the 1990 French Open , winning nine of them .