Yeon Woo Ku: Ranking, Schedule & Stats
Yeon Woo Ku is a professional tennis player from South Korea, born 15 March 2003. Ku competes on the WTA Tour. Ku was born in Seoul.
This page tracks Yeon Woo Ku'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 season2026Ku has won 12 of the last 27 first sets
Ku has won 4 of 12 deciding sets
Ku has won 5 of the last 10 matches
Ratings & strengths
Umpiry ratings · updated dailyHow a player performs in the biggest moments, across 105 matches in our records. About
Surface performanceSurfaces
2026 seasonLast 12 monthsCareerMost matches this season came on hard: 6–6.
Most matches over the last 12 months came on hard: 6–6.
Most matches across the career came on hard: 10–15.
Ranking & projection
WTA ranking · not EloWTA · not EloRecent results
Last 5Beyond today · rivals & careerBeyond today
Rivals
Most meetings
Most-played rivals. The record is Ku's wins–losses across all matches we have, qualifying excluded.
Season
Current seasonResults
Season breakdown
2026 · by level, surface, opponent, sets2026Career
Career overview
More career statistics
Career serve & return
Absolute totals across the 28 matches we have on record. Green is Ku, grey is the same stat by the players they faced.
Aces
| Ku | 295 |
|---|---|
| Opponents | 457 |
Double faults
| Ku | 1,216 |
|---|---|
| Opponents | 1,203 |
1st serve in
| Ku | 64% 14,337 / 22,339 |
|---|---|
| Opponents | 64% 14,309 / 22,465 |
1st-serve points won
| Ku | 61% 8,694 / 14,337 |
|---|---|
| Opponents | 56% 7,975 / 14,309 |
Break points converted
| Ku | 51% 1,679 / 3,268 |
|---|---|
| Opponents | 47% 1,263 / 2,696 |
Break points saved
| Ku | 53% 1,433 / 2,696 |
|---|---|
| Opponents | 49% 1,589 / 3,268 |
1st-serve points won by season
| Season | Ku | Opponents |
|---|---|---|
| 2026 | 58% | 59% |
| 2025 | 62% | 55% |
| 2024 | 60% | 56% |
| 2023 | 61% | 58% |
| 2022 | 61% | 59% |
| 2021 | 62% | 54% |
| 2019 | 59% | 46% |
| Career | 61% | 56% |
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 | 1–1 | 50% | 0 |
| Other tour level | 0–7 | 0% | — |
| Tour level | 1–8 | 11% | 0 |
| Challenger | 3–2 | 60% | 0 |
| ITF / Futures | 163–97 | 63% | 9 |
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 · 19–20 · W–L 49% · 39 matches
Round played
| Qualifying | 5–6 (45%) |
|---|---|
| R32 | 6–9 (40%) |
| R16 | 4–2 (67%) |
| SF | 2–1 (67%) |
| F | 1–1 (50%) |
Surface
| Hard | 19–16 (54%) |
|---|---|
| Hard (indoor) | 0–1 (0%) |
| Clay | 0–2 (0%) |
| Grass | 0–1 (0%) |
Tournament level
| Grand Slam | 1–4 (20%) |
|---|---|
| Main tour | 2–2 (50%) |
| Challenger | 16–14 (53%) |
Opponent ranked
| vs top 100 | 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 | 19–16 | 0–2 | 0–1 | 0–1 | 19–20 |
| 2025 | 61–20 | · | 2–2 | · | 63–22 |
| 2024 | 34–23 | 4–1 | · | 1–3 | 39–27 |
| 2023 | 21–20 | 5–3 | · | 5–1 | 31–24 |
| 2022 | 14–12 | 2–2 | · | 5–3 | 21–17 |
| 2021 | 30–10 | 13–7 | · | 9–2 | 52–19 |
| 2019 | 9–4 | · | · | · | 9–4 |
| 2018 | 1–1 | · | · | · | 1–1 |
| 2017 | 4–3 | · | · | · | 4–3 |
| Career | 193–109 64% | 24–15 62% | 2–3 40% | 20–10 67% | 239–137 64% |
Season statistics
Each stat is stored as a value–count pair, so seasons can be added together and the rate is always value ÷ count.
2023–2025 · 4 games summed across the range
| Stat | Value | Count | Rate |
|---|---|---|---|
| Aces | 1 | 35.5 service games | 0.0 / game |
| Double faults | 14 | 35.5 service games | 0.4 / game |
| 1st serve in | 174 | 259 serve points | 67% |
| 1st-serve points won | 86 | 174 1st serves in | 49% |
| 2nd-serve points won | 41 | 85 2nd serves | 48% |
| Service points won | 127 | 259 serve points | 49% |
| Return points lost | 76 | 214 return points | 36% |
| Break points saved | 25 | 45 faced | 56% |
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 South Korea
All →Frequently asked · Yeon Woo KuFrequently asked
When was Yeon Woo Ku born?
Yeon Woo Ku was born on 15 March 2003 (23 years old).
Where is Yeon Woo Ku from?
Yeon Woo Ku is from South Korea, born in Seoul on 15 March 2003.
Cite this
Yeon Woo Ku is ranked No. 177 in the WTA singles rankings with 428 points. Umpiry, "Yeon Woo Ku: Ranking, Schedule & Stats", https://umpiry.com/players/yeon-woo-ku-kor?utm_source=cite (as of 24 September 2026).