Gus Grumet vs Daniil Ostapenkov — Tiburon Qualifying Round of 32
Tiburon · CHALLENGER · Qualifying Round of 32
—
Sets
Sunday, 13 September 2026 ·
hard
Grumet G.vs
Ostapenkov D.
Win Probability
Pre-match · updated 11:50 UTCGrumet G.19%
Ostapenkov D.81%
Toss-up
50–58%
50–58%
Slight edge
58–67%
58–67%
Clear favourite
67–80%
67–80%
Strong favourite
80%+
80%+
Strong favourite · Ostapenkov D. heavily favoured
Calibrated model · 63% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.
Common opponents
Last 12 monthsNo common opponents in the last 12 months.
Includes tour-level, 125s, qualifying and team events (⚑). Walkovers excluded. Describes past results in different contexts — not a prediction.
Umpiry Score
Pre-match5.6
Slight disadvantageUmpiry ScorePartial · surface data limited5.6
Slight disadvantageUmpiry ScorePartial · surface data limitedForm & Matchup
5.0No prior meetings
H2H5.0No prior meetings
Surface form
5.16 of last 10 on hard
0.0
Win streak0.0Lost last 2
Context
5.0Didn't play here last year
Defending pts5.0Didn't play here last year
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.
1 vs 19 matches
Statistics
This season1st serve in·Even
56%
58%
1st serve points won·Clear edge
59%
71%
2nd serve points won·Clear edge
39%
54%
Service points won·Clear edge
50%
64%
Return points won·Even
39%
38%
Break points saved·Slight edge
58%
50%
Aces / match·Dominant
0.0
7.5
Double faults / match·Clear edge
5.0
4.2
Averages over each player's completed matches in the selected window (1 vs 19). ATP, WTA & Challenger.
Serve vs return
This seasonServe advantage — Ostapenkov D.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About
Conditions
Weather forecast
25°CClear
Wind 16 km/hHumidity 34%
Head to head
No previous meetings on record.