Beatriz Haddad Maia pulled double duty to beat the Kudermetova sisters in back-to-back singles matches at the Korea Open on Saturday, reaching the final to face top-seeded Daria Kasatkina. The quarterfinals and semifinals were played on the same day because rain washed out all action Friday. Haddad Maia beat Polina Kudermetova 6-2, 6-1 to reach the last four and then got past Veronika Kudermetova 6-4, 6-4.