South Africa's top seed Chanel Simmonds beat the 2nd seed and world no 299 Natalija Kostic 7-6(5), 6-1 in an hour and 53 mins earlier today.
Chanel capitalized on the unforced errors made by the Croatian, to qualify for the quarter-finals in Changwon, South Korea.
Meanwhile Chanel and partner Chieh-Yu Hsu from Taipei are also through to the semi-finals of the doubles. .