Dayeon Back def. Jelena Ostapenko — Round of 32, Korea Open 2023

What decided it

• Back broke 6 times from 11 chances, Ostapenko 5 from 14
• Ostapenko won 33% behind her second serve, Back 46%
• The third set went to a tiebreak, Back took it 7–4
• Back came back from a set down
• 1 aces and 9 double faults from Ostapenko