William Jansen: Ranking, Schedule & Stats
William Jansen is a professional tennis player from United Kingdom, born 6 December 2004. The Briton plays left-handed with a two-handed backhand. The Briton was born in London.
This page tracks William Jansen's upcoming schedule, latest results, recent form and surface record, with each match linking through to a detailed head-to-head and pre-match analysis. Scores update live as matches are played.
Current form
2026 season2026Ratings & strengths
Umpiry ratings · updated dailyRecent results
Last 1Beyond today · rivals & careerBeyond today
Rivals
Most meetings
Most-played rivals. The record is Jansen's wins–losses across all matches we have, qualifying excluded.
Season
Completed seasonResults
Season breakdown
2021 · by level, surface, sets2021Career
Career overview
More career statistics
Career serve & return
Absolute totals across the 1 matches we have on record. Green is Jansen, grey is the same stat by the players they faced.
1st-serve points won by season
| Season | Jansen | Opponents |
|---|---|---|
| 2026 | 75% | 57% |
| 2025 | 70% | 70% |
| 2024 | 71% | 65% |
| 2023 | 67% | 67% |
| 2022 | 70% | 67% |
| Career | 70% | 66% |
Counted from the match statistics we hold, season by season — the cards above are career totals from our data provider, so the two can differ by a few tenths. Seasons with fewer than three matches on record are left out.
Career win–loss by level
| Level | W–L | Win % | Titles |
|---|---|---|---|
| ITF / Futures | 27–26 | 51% | 0 |
Challenger and ITF matches are shown in grey and are not part of the tour-level total.
Season breakdown
Wins and losses in one season, split by round reached, surface, tournament level and opponent ranking band.
2026 season · 10–8 · W–L 56% · 18 matches
Round played
| Qualifying | 1–0 (100%) |
|---|---|
| R32 | 2–0 (100%) |
| R16 | 1–1 (50%) |
| SF | 0–1 (0%) |
Surface
| Hard | 8–5 (62%) |
|---|---|
| Grass | 2–3 (40%) |
Tournament level
| Challenger | 2–3 (40%) |
|---|---|
| ITF / Futures | 8–5 (62%) |
Rounds are the round each match was played in, not a ladder: a player enters a 32-draw straight in R32, and team events (United Cup, Davis Cup) are not played through a draw at all — those have their own row. Ranking bands use the opponent's ranking on match day and are cumulative: top 100 includes top 10.
Surface record by season
Each cell is one season on one surface: the number is wins–losses, the colour is the win rate. Carpet is counted as indoor hard.
| Season | Hard | Clay | Grass | I.hard | Total |
|---|---|---|---|---|---|
| 2026 | 9–6 | · | 2–3 | · | 11–9 |
| 2025 | 2–3 | · | 0–1 | 7–3 | 9–7 |
| 2024 | 12–4 | · | 0–1 | 2–2 | 14–7 |
| 2023 | 5–5 | · | 1–2 | · | 6–7 |
| 2022 | 9–9 | · | 2–3 | · | 11–12 |
| 2021 | · | · | 0–1 | · | 0–1 |
| Career | 37–27 58% | · | 5–11 31% | 9–5 64% | 51–43 54% |
Season statistics
Each stat is stored as a value–count pair, so seasons can be added together and the rate is always value ÷ count.
2026 season · 1 games summed across the range
| Stat | Value | Count | Rate |
|---|---|---|---|
| Aces | 11 | 1 service games | 11.0 / game |
| Double faults | 2 | 1 service games | 2.0 / game |
| 1st serve in | 44 | 67 serve points | 66% |
| 1st-serve points won | 34 | 44 1st serves in | 77% |
| Break points saved | 2 | 4 faced | 50% |
Value is what happened (aces hit, points won), count is how often it could (service games, points played). Adding seasons adds both — the rate is never averaged from percentages.
More on Umpiry · discovery
More players from United Kingdom
All →Frequently asked · William JansenFrequently asked
When was William Jansen born?
William Jansen was born on 6 December 2004 (21 years old).
Where is William Jansen from?
William Jansen is from United Kingdom, born in London on 6 December 2004.
Is William Jansen right or left-handed?
William Jansen plays left-handed with a two-handed backhand.
Who is William Jansen's coach?
William Jansen is coached by David Felgate.