The Korea Open saw a wave of upsets in the second round, with three seeded players crashing out. Katerina Siniakova stunned fourth seed Daria Kasatkina 7-6 (2), 6-2, breaking the Australian three times in the second set. Fifth seed Diana Shnaider fell to the Netherlands’ Suzan Lamens 6-4, 6-2, while German qualifier Ella Seidel outlasted sixth seed Beatriz Haddad Maia in a thrilling 3-hour-28-minute battle, 6-7 (4), 7-6 (3), 7-5. Top seed Iga Swiatek and No. 2 Ekaterina Alexandrova advanced safely to the quarterfinals, where Seidel will face Alexandrova and Siniakova meets Lamens.
