gabriela sabatini defeated two-time defending champion steffi graf in the final, 6–2, 7–6, to win the women's singles tennis title at the 1990 u.s. open. this was a rematch of the 1988 us open final and the 1989 us open top half semifinal. sabatini became the first argentine female tennis player to win the major. it also proved to be the first and only time sabatini would defeat graf in grand slam competition.