Marta Kostyuk defeated Heather Watson 6-2, 6-2 in the round of 16 at the WTA 250 event in Seoul on a hard court, confirming her status as pre-match favourite with a dominant display. Watson, competing at substantial odds of 5.95, offered minimal resistance as Kostyuk controlled proceedings from the outset, dropping only four games across two sets. The Ukrainian's clinical performance underlined her superiority on the day and justified the bookmakers' assessment of the matchup. Kostyuk's progression to the quarterfinals demonstrates her current form on hard courts and keeps her tournament run on track.