William Jansen
🇬🇧United Kingdom· Unranked· 21y· ATP
11–9 · last 52 weeks
9–6 on hard courts in the last 52 weeks, his best surface.
Last match
L
vsSean Daryabeigi
M15 Columbia · SF · Hard · Sep 26, 2026
6-7ret.Match details
Form & record· last 52 weeks
- 11–9
- Record
- 55%
- Win rate
- Last 5
- 7–3
- Last 10
Hard 9–6Grass 2–3
Record by season
| Season | Total | Hard | Clay | Grass | Indoor |
|---|---|---|---|---|---|
| All | 34–3947% | 25–2550% | — | 4–931% | 5–550% |
| 2026 | 10–856% | 8–562% | — | 2–340% | — |
| 2025 | 5–742% | 2–340% | — | 0–10%† | 3–350% |
| 2024 | 7–750% | 5–456% | — | 0–10%† | 2–250%† |
| 2023 | 3–730% | 2–529% | — | 1–233%† | — |
| 2022 | 9–1047% | 8–850% | — | 1–233%† | — |
† fewer than 5 matches
Recent matches
M15 Columbia · ITFHard · 2026
Averages exclude retirements and defaults
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Opponent rank
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Record · last 52 weeks
- 11–9
- Record
- 55%
- Win rate
- 23.1
- Avg games
- −2.0
- Avg spread
Surface & Conditions
| Category | W–L | Win | Spread | Games | Hold |
|---|---|---|---|---|---|
| HardOpp ~#754 | 9–6 | 60% | −2.5 | 21.9 | — |
| GrassOpp ~#220 | 2–3 | 40% | −0.6 | 26.2 | 81%(4) |
Level & Opponents
| Category | W–L | Win | Spread | Games | Hold |
|---|---|---|---|---|---|
| ChallengerOpp ~#220 | 2–3 | 40% | −0.6 | 26.2 | 81%(4) |
| ITFOpp ~#754 | 9–6 | 60% | −2.5 | 21.9 | — |
| vs 100+ | 7–6 | 54% | −1.2 | 23.7 | 81%(4) |
| vs Unranked | 4–3 | 57% | −3.7 | 21.7 | — |
| vs LeftiesOpp ~#559 | 0–2 | 0% | +4.5 | 30.5 | 81%(1) |
| vs RightiesOpp ~#734 | 5–4 | 56% | −1.7 | 22.3 | 81%(3) |
Event & Format
| Category | W–L | Win | Spread | Games | Hold |
|---|---|---|---|---|---|
| First match of eventOpp ~#881 | 5–1 | 83% | −3.8 | 20.2 | — |
| Later roundsOpp ~#595 | 4–6 | 40% | −1.0 | 24.3 | 81%(1) |
Serve
| Metric | L5 | L10 | L52 Wks |
|---|
L52 Wks:Hold % 81%Break % 22%Ace rate 8.2%1st-serve points won 69%Dominance ratio 1.11
4 matches with serve stats
Workload & retirements
| Situation | Value |
|---|---|
| Matches, last 7 days | 4 |
| Matches, last 14 days | 4 |
| Days since last match | 2 |
| Retired, last 52 Wks | 1 |
| Retired, career | 2 |
Averages exclude retirements and defaults