Celine Naef defeated Marta Kostyuk 6-4 7-6 in the BJK Cup Qualifiers round robin. The upset overturned the form book — Marta Kostyuk came in ranked #11.
No previous meetings on record.
Averages over each player's completed matches in the selected window (101 vs 75). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Kostyuk M.: 1 day rest · 3 matches, 79 games (7d). Higher means fresher. About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About