William Jansen

United Kingdom21 years oldLeft-handed1.88 m

ATP rank

#103990 places this week

Points: 17
Career high: #1023Dec 2022
Titles: 0
2026: 10–8

#1039This week

Best #1023 in Dec 2022

No match scheduled.

Points to defend

1points to defend in the next 8 weeks

Next: Columbus, 1 pts on Nov 23

Pro shows every event being defended, the round and its share of the total.

See it with Pro

ATP rankings breakdown, Sep 28

Splits

Matches

10–856%

18 matches in 2026

LatestLost to Sean Daryabeigi, Columbia, Sc SF26 Sep

Sets: 24–1857%
Tiebreaks: 2–625%
Deciding sets: 3–443%
From a set down: 3–730%
Finals: 0–0

Columbia, Sc 2026ITF M15Court speedLost SF

17⁷

06⁴

R1624 Sep

Aldershot 2026ITF M25Court speedLost R16

R1630 Jul

R3229 Jul

Champaign 2026ITF M25Court speedLost SF

27⁷7⁷

06⁴6⁵

Underdog won · #1373 beat #462 R1623 Jul

Louisville 2026ITF M25Court speedLost R16

R1616 Jul

Alexander Frusina

27¹⁰6

William Jansen

06⁸4

R3215 Jul

Nottingham 3 Challenger 2026ChallengerCourt speedLost R32

R327 Jul

266⁵6

147⁷4

26⁶66

17⁸44

Underdog won · #1597 beat #711 Q15 Jul

Serve & return

Last 12 months against the tour average

Pro Holds, breaks, aces, first and second serve, break points saved and return points won, each against the tour average.

Season by season

92 matches on record

SeasonAllHardClayGrassTitlesBest rank

202610–88–5–2–3#1129

20259–79–6–0–1#1173

202414–714–6–0–1#1131

20236–76–7––#1049

202211–1211–11–0–1#1058

20210–1––0–1

Best wins, last 12 months

ChampaignQuarterfinal24 Jul

Underdog won · #1373 beat #462 Nottingham 3 ChallengerQualifying R26 Jul

William Jansen

26⁶66

Theo Papamalamis

17⁸44

Underdog won · #1597 beat #711 Columbia, ScRound of 3223 Sep

William Jansen

267⁷

Seydina Andre

026²

Columbia, ScQuarterfinal25 Sep

Most played

Head-to-head against the opponents Jansen has met most