Steffi Graf competed in 9 majors in two years.
Steffi Graf . Graf reached thirteen consecutive Grand Slam singles finals , from the 1987 French Open through to the 1990 French Open , winning nine of them . She won 5 consecutive Majors ( 1988 Australian Open to 1989 Australian Open ) , and seven Majors out of eight , in two calendar years ( 1988 Australian Open to 1989 US Open , except 1989 French Open ) .