Dayeon Back defeated Yue Yuan in the Round of 32 at the Korea Open in Seoul, advancing with a 6-3, 4-6, 6-1 victory on hard courts. Back converted 36 percent of her break points, while Yuan converted 43 percent; Back secured four service breaks to Yuan's three. The match saw no aces or double faults from Back, while Yuan committed three double faults.
Generated automatically from Umpiry match data.
hold to 0/15to 30to 40 / deucebroken
No previous meetings on record.
Averages over each player's completed matches in the selected window (43 vs 39). ATP, WTA & Challenger.
Slight edge · Back D. narrowly ahead
Calibrated model · 65% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.
The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About