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 . She won 107 singles titles , which ranks her third on the WTA 's all-time list after Martina Navratilova ( 167 titles ) and Chris Evert ( 157 titles ) . She reached a total of 31 Grand Slam singles finals .