A foot injury forced Emma Raducanu to retire from the Korea Open quarter-finals on Saturday, while third seed Beatriz Haddad Maia beat sisters Polina and Veronika Kudermetova on the same day to set up a Korea Open final clash with top seed Daria Kasatkina.

Russia's top seed Daria Kasatkina will face Brazil's Beatriz Haddad Maia in Sunday's Korea Open final after both came through their semi-finals in straight sets.

Emma Raducanu made her first retirement of the season at the Korea Open in Seoul on Saturday. Suffering from pain in her left foot, she pulled out of her quarter-final against top seed Daria Kasatkina while trailing 6-1.