SEOUL: Slovakian second seed Anna Karolina Schmiedlova advanced on Wednesday to the quarter-final of the WTA Korea Open after a tough bout with Christina McHale of the United States. Schmiedlova needed three sets to oust McHale 6-2, 4-6, 6-3.

Belgium’s Alison Van Uytvanck took a tiebreaker to win the third set against Katerina Siniakova of the Czech Republic 6-3, 1-6, 7-6 (7/3). Swedish Johanna Larsson booked her place in the quarter-final with a victory over German Julia Goerges 7-5, 6-4. German Mona Barthel crushed Mariana Duque 6-2, 6-1.