NetherlandsS. Klaassen: Ranking, Schedule & Stats
S. Klaassen is a professional tennis player from Netherlands, born 19 April 2003. The Dutchman competes on the ATP Tour.
This page tracks S. Klaassen'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.
Rankings
Ranking Projection
Trajectory from our weekly snapshots. How the projection works. ATP points table.
Career highs
Ranking trajectory from our weekly snapshots (last ~12 months); peak rating and longest tour-level win streak from our match records. What Umpiry rank means.
Titles & lost finals by tournament level
1 tour-level final — 0 won, 1 lost. Grouped by the category the event held when the final was played.
| Grand Slam | none |
|---|---|
| ATP Masters 1000 | none |
| ATP 500 | none |
| ATP 250 | none |
| Challenger | none |
| ITF / Futures | 0–1 (0%) |
ITF
Not counted in career, form or surface stats.
More Netherlands players
All players →Explore the rankings
Frequently asked questions
When was S. Klaassen born?
S. Klaassen was born on 19 April 2003 (23 years old).
Where is S. Klaassen from?
S. Klaassen is from Netherlands.
Career serve & return
Absolute totals across the 0 matches we have on record. Green is Klaassen, grey is the same stat by the players they faced.
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.
Season breakdown
Wins and losses in one season, split by round reached, surface, tournament level and opponent ranking band. Pick a season from the list or click a bar.
| Qualifying | 1–0 (100%) |
|---|---|
| R32 | 4–3 (57%) |
| R16 | 1–3 (25%) |
| SF | 0–1 (0%) |
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 | 5–5 | 5–3 | · | · | 10–8 |
| 2025 | 9–2 | 5–3 | · | · | 14–5 |
| 2024 | 4–3 | 7–6 | · | · | 11–9 |
| 2023 | · | 5–3 | · | · | 5–3 |
| 2022 | · | 0–1 | · | · | 0–1 |
| Career | 18–1064% | 22–1658% | · | · | 40–2661% |
Record at one tournament
Every edition entered: year, best round reached, wins and losses. Most recent first.
- Editions
- 3
- Record
- 4–3
- Titles
- 0
| Year | Best round | W | L | Wins and losses as a bar |
|---|---|---|---|---|
| 2025 | Q32 | 1 | 0 | |
| 2024 | R32 | 1 | 2 | |
| 2023 | R32 | 2 | 1 |