Zhizhen Zhang vs Otto Virtanen — Nottingham Semi-final
Zhang Z.
Zhizhen Zhang faces Otto Virtanen in the Nottingham semi-final on grass. Otto Virtanen holds the paper edge — ranked #160, a roughly 140-point grass Elo advantage. Recent grass form is closely matched.
Win Probability
Pre-match · updated 21:22 UTC50–58%
58–67%
67–80%
80%+
Clear favourite · Virtanen O. clearly ahead, but no certainty
Calibrated model · 63% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.
Key context
- Last match: Zhizhen Zhang dropped the opening set before beating Roman Safiullin 6–7 7–6 6–1.
- Last match: Otto Virtanen won all two sets in tiebreaks against Billy Harris.
- Fatigue load: Both played three three-setters in the past fortnight — neither arrives fresh.
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 (25 vs 24). 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
Freshness
Recent loadZhang Z.: 2 days rest · 6 matches, 142 games (7d) · Virtanen O.: 1 day rest · 2 matches, 37 games (7d). Higher means fresher. About
Conditions
Head to head
No previous meetings on record.