1969- . West German lawn tennis player, who brought Martina Navratilova's long reign as the world's number one female player to an end. She reached the semi-final of the US Open 1985 at the age of 16, and won five consecutive Grand Slam singles titles 1988-89. CAREER HIGHLIGHTS Wimbledon singles: 1988-89 doubles: 1988 US Open singles: 1988-89 French Open singles: 1987-88 Australian Open singles: 1988-90