Stian Klaassen

Netherlands23 years old

ATP rank

#13113 places this week

Points: 8
Career high: #1068Jul 2025
Titles: 0
2026: 8–8

#1311This week

Best #1068 in Jul 2025

No match scheduled.

Points to defend

0points to defend in the next 8 weeks

Nothing to defend in the next 8 weeks

ATP rankings breakdown, Sep 28

Splits

Matches

8–850%

16 matches in 2026

LatestLost to Emilien Demanet, Oldenzaal R1627 Aug

Sets: 19–1753%
Tiebreaks: 1–150%
Deciding sets: 1–325%
From a set down: 0–60%
Finals: 0–0

Oldenzaal 2026ITF M25Court speedLost R16

R1627 Aug

R3226 Aug

Lambermont 2026ITF M15Court speedLost R32

R3219 Aug

Turku 2026ITF M15Court speedLost R32

R3211 Aug

Arvid Nordquist

27⁷6

Stian Klaassen

06⁵4

Eupen 2026ITF M15Court speedLost R16

R166 Aug

R325 Aug

Christopher Patzanovsky

011

Rancho Santa Fe 2026ITF M15Court speedLost SF

R169 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

64 matches on record

SeasonAllHardClayGrassTitlesBest rank

20268–85–53–3–#1205

202514–59–25–3–#1103

202411–94–37–6–#1565

20235–30–15–2–

20220–1–0–1–

Best wins, last 12 months

EupenRound of 325 Aug

San DiegoRound of 321 Jul

Rancho Santa FeQuarterfinal10 Jul

Rancho Santa FeRound of 169 Jul

Most played

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

Titles

0 titles from 1 final.