Sofia Costoulas: Ranking, Schedule & Stats
Sofia Costoulas is a professional tennis player from Belgium, born 2 April 2005. The Belgian competes on the WTA Tour. Among WTA players under 22, Costoulas is ranked No. 25. The Belgian was born in Genk.
This page tracks Sofia Costoulas'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 season2026Costoulas has won 16 of the last 30 first sets
Costoulas has won 4 of 9 deciding sets
Costoulas has won 3 of the last 10 matches
Ratings & strengths
Umpiry ratings · updated dailyHow a player performs in the biggest moments, across 104 matches in our records. About
0–100 percentile vs currently-ranked players, opponent-adjusted over 52 weeks. By-surface ratings are percentiles within each surface's field (not directly comparable across surfaces). Sub-components are percentiles too; aces are a style descriptor (not in the rating). About
Surface performanceSurfaces
2026 seasonLast 12 monthsCareerWin rates are close this season: hard 52%, clay 50%.
Win rates are close over the last 12 months: hard 55%, clay 50%.
Win rates are close across the career: hard 54%, clay 47%.
Ranking & projection
WTA ranking · not EloWTA · not EloRecent results
Last 5Beyond today · rivals & careerBeyond today
Rivals
Most meetings
Most-played rivals. The record is Costoulas's wins–losses across all matches we have, qualifying excluded.
Season
Current seasonResults
Season statistics
2026 · 7 matches · vs Top 100 averageSeason breakdown
2026 · by level, surface, opponent, sets2026Career
Career overview
Best results in our records over the last ~12 months; the top 18 count toward the WTA ranking (best-18 rule). Totals are derived from our data and can differ from the official ranking, which has mandatory-event rules and includes the Tour Finals.
More career statistics
Career serve & return
Absolute totals across the 58 matches we have on record. Green is Costoulas, grey is the same stat by the players they faced.
Aces
| Costoulas | 963 |
|---|---|
| Opponents | 584 |
Double faults
| Costoulas | 743 |
|---|---|
| Opponents | 1,206 |
1st serve in
| Costoulas | 61% 13,980 / 22,994 |
|---|---|
| Opponents | 64% 15,053 / 23,694 |
1st-serve points won
| Costoulas | 65% 9,059 / 13,980 |
|---|---|
| Opponents | 60% 9,068 / 15,053 |
Break points converted
| Costoulas | 48% 1,401 / 2,932 |
|---|---|
| Opponents | 45% 1,109 / 2,449 |
Break points saved
| Costoulas | 55% 1,340 / 2,449 |
|---|---|
| Opponents | 52% 1,531 / 2,932 |
1st-serve points won by season
| Season | Costoulas | Opponents |
|---|---|---|
| 2026 | 68% | 61% |
| 2025 | 67% | 61% |
| 2024 | 61% | 60% |
| 2023 | 66% | 60% |
| 2022 | 65% | 60% |
| 2021 | 61% | 59% |
| 2020 | 56% | 55% |
| Career | 65% | 60% |
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 |
|---|---|---|---|
| WTA 500 | 0–3 | 0% | 0 |
| WTA 250 | 2–1 | 67% | 0 |
| Other tour level | 1–2 | 33% | — |
| Tour level | 3–6 | 33% | 0 |
| Challenger | 16–14 | 53% | 0 |
| ITF / Futures | 163–106 | 61% | 6 |
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 · 32–26 · W–L 55% · 58 matches
Round played
| Qualifying | 8–12 (40%) |
|---|---|
| R32 | 13–10 (57%) |
| R16 | 8–7 (53%) |
| SF | 1–0 (100%) |
| F | 1–0 (100%) |
Surface
| Hard | 22–13 (63%) |
|---|---|
| Hard (indoor) | 2–4 (33%) |
| Clay | 8–8 (50%) |
| Grass | 0–1 (0%) |
Tournament level
| Grand Slam | 3–4 (43%) |
|---|---|
| Main tour | 6–5 (55%) |
| Challenger | 23–17 (58%) |
Opponent ranked
| vs top 50 | 0–2 (0%) |
|---|---|
| vs top 100 | 0–3 (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 | 21–15 | 8–8 | 0–1 | 2–3 | 31–27 |
| 2025 | 20–10 | 9–4 | 0–1 | 21–12 | 50–27 |
| 2024 | 17–12 | 20–16 | · | 6–5 | 43–33 |
| 2023 | 24–13 | 17–12 | · | 3–4 | 44–29 |
| 2022 | 18–10 | 0–2 | · | 4–1 | 22–13 |
| 2021 | 14–5 | 1–7 | · | · | 15–12 |
| 2020 | · | 2–1 | · | · | 2–1 |
| Career | 114–65 64% | 57–50 53% | 0–2 0% | 36–25 59% | 207–142 59% |
Season statistics
Each stat is stored as a value–count pair, so seasons can be added together and the rate is always value ÷ count.
2024–2026 · 9 games summed across the range
| Stat | Value | Count | Rate |
|---|---|---|---|
| Aces | 25 | 103.5 service games | 0.2 / game |
| Double faults | 34 | 103.5 service games | 0.3 / game |
| 1st serve in | 380 | 666 serve points | 57% |
| 1st-serve points won | 244 | 380 1st serves in | 64% |
| 2nd-serve points won | 127 | 286 2nd serves | 44% |
| Service points won | 371 | 666 serve points | 56% |
| Return points lost | 306 | 696 return points | 44% |
| Break points saved | 52 | 87 faced | 60% |
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
Frequently asked · Sofia CostoulasFrequently asked
When was Sofia Costoulas born?
Sofia Costoulas was born on 2 April 2005 (21 years old).
Where is Sofia Costoulas from?
Sofia Costoulas is from Belgium, born in Genk on 2 April 2005.
How good is Sofia Costoulas on hard?
On hard, Sofia Costoulas has compiled a 20-17 record (54% wins).
Cite this
Sofia Costoulas is ranked No. 159 in the WTA singles rankings with 471 points. Umpiry, "Sofia Costoulas: Ranking, Schedule & Stats", https://umpiry.com/players/sofia-costoulas-bel?utm_source=cite (as of 5 October 2026).