Aryna Sabalenka vs Nikola Bartunkova — Berlin Quarter-final
Sabalenka A.
Aryna Sabalenka faces Nikola Bartunkova in the Berlin quarter-final on grass. Aryna Sabalenka holds the paper edge — ranked #1, defending last year's semi-final, a roughly 340-point grass Elo advantage.
Win Probability
Pre-match · updated 19:22 UTC50–58%
58–67%
67–80%
80%+
Strong favourite · Sabalenka A. heavily favoured
Calibrated model · 65% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.
Key context
- Freshness: Workload contrast: Aryna Sabalenka 27 games in 14 days, Nikola Bartunkova 180.
- Form trend: Nikola Bartunkova's form has been trending up over recent weeks, while Aryna Sabalenka's has cooled.
- Last match: Nikola Bartunkova dropped just 5 games past Elise Mertens.
Umpiry Score
Pre-matchThe Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Form trajectory
Direction of recent form — results vs Elo expectation blended with serve/return vs each player's baseline, over the last few months. About
Statistics
This seasonAverages over each player's completed matches in the selected window (21 vs 26). ATP, WTA & Challenger.
Serve vs return
This seasonEach player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Clutch
Under pressurePerformance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Serve & return on grass
Per-surface Serve / Return Rating (0–100, percentile within the grass field, opponent-adjusted over 52 weeks). About
Freshness
Recent loadSabalenka A.: 14 days rest · 1 match (14d) · Bartunkova N.: 2 days rest · 2 matches, 65 games (7d). Higher means fresher. About
Conditions
Head to head
No previous meetings on record.