<Tr> <Th_colspan="2"> Previous head - to - head results </Th> </Tr> <Tr> <Td_colspan="2"> Osaka 1--0 S. Williams </Td> </Tr> <P> The 2018 US Open Women's Singles final was the championship tennis match of the Women's Singles tournament at the 2018 US Open . It was contested between Serena Williams and Naomi Osaka, seeded 17th and 20th respectively . Osaka defeated Williams in straight sets, 6 - 2, 6 - 4 in one hour and 19 minutes . </P> <P> The match was historically significant for both players . It was Williams' first US Open after a 12 - month hiatus to give birth to her first child in September 2017, and second attempt since her pregnancy (after that year's Wimbledon) to equal Margaret Court's all - time record of 24 Grand Slam titles . Osaka was the first Japanese player to contest a Grand Slam women's singles final, and was attempting to become the first able - bodied Japanese player, male or female, to win a Grand Slam singles title . </P>

Who won the 2018 us open women's