H2H data updated: 2026-09-13 00:00 UTC

Klara Koukalova vs Yung Jan Chan H2H: 0-1

Yung Jan Chan holds a 1–0 lead over Klara Koukalova in their WTA head-to-head. Across 1 main-draw meeting, Yung Jan Chan leads 1–0 on clay. Most recently, Yung Jan Chan won the 2011 Roland Garros round of 128 7-5 6-1.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Klara Koukalova
CZE Age 44 Right-Handed 166 cm / 5'5"
H2H
0 – 1
1 main-draw meetings
Yung Jan Chan
TPE Age 37 Right-Handed 170 cm / 5'7"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Yung Jan Chan 7-5 6-1 Klara Koukalova #32 Match data May 24, 2011* R128 Roland Garros Grand Slam Clay

Estimated match date where the exact historical date is unavailable. Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.

Career Comparison

Player Current Peak Pts Elo W L Win % GS 1000 including documented historical predecessor categories Finals 500 including documented historical predecessor categories 250 including documented historical predecessor categories Titles
Klara Koukalova #566 #20 1,860 1,803 275 288 48.8% 0 0 0 0 3 3
Yung Jan Chan — — — 1,636 49 84 36.8% 0 0 0 0 0 0

Career Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.

Age Klara Koukalova Yung Jan Chan
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
15 — — — — — — — 2005 0–1 0.0% — 1,499 0 0
16 — — — — — — — 2006 3–3 50.0% — 1,526 0 0
17 — — — — — — — 2007 10–16 38.5% — 1,572 0 0
18 — — — — — — — 2008 15–20 42.9% — 1,606 0 0
19 2001 5–4 55.6% #139 1,519 0 0 2009 7–12 36.8% — 1,595 0 0
20 2002 4–5 44.4% #117 1,527 0 0 2010 5–13 27.8% — 1,532 0 0
21 2003 14–19 42.4% #63 1,537 0 0 2011 3–6 33.3% — 1,530 0 0
22 2004 26–23 53.1% #46 1,611 0 0 2012 4–4 50.0% — 1,584 0 0
23 2005 32–19 62.7% #35 1,764 0 2 2013 1–2 33.3% — 1,582 0 0
24 2006 10–22 31.2% #117 1,546 0 2 2014 1–6 14.3% — 1,523 0 0
25 2007 12–12 50.0% #63 1,578 0 2 2015 0–1 0.0% — 1,505 0 0
26 2008 21–22 48.8% #72 1,574 0 2 — — — — — — —
27 2009 8–17 32.0% #90 1,533 0 2 — — — — — — —
28 2010 20–20 50.0% #41 1,656 0 2 — — — — — — —
29 2011 29–25 53.7% #41 1,713 0 2 — — — — — — —
30 2012 24–22 52.2% #28 1,721 0 2 — — — — — — —
31 2013 27–25 51.9% #35 1,675 0 2 — — — — — — —
32 2014 29–27 51.8% #40 1,611 0 3 — — — — — — —
33 2015 14–22 38.9% #99 1,549 0 3 — — — — — — —
34 2016 0–4 0.0% #400 1,486 0 3 — — — — — — —

Surface Results by Age

Seasons are aligned by the age each player spent most of that calendar year. Results cover completed main-draw matches. Bold green marks the higher win percentage when both players have at least 5 matches on that surface at the aligned age.

Age Klara Koukalova Yung Jan Chan
Yr HardClayGrassCarpet Yr HardClayGrassCarpet
W L M Win % W L M Win % W L M Win % W L M Win % W L M Win % W L M Win % W L M Win % W L M Win %
15 — — — — — — — — — — — — — — — — — 2005 0 1 1 0.0% — — — — — — — — — — — —
16 — — — — — — — — — — — — — — — — — 2006 3 2 5 60.0% — — — — 0 1 1 0.0% — — — —
17 — — — — — — — — — — — — — — — — — 2007 7 10 17 41.2% 2 3 5 40.0% 1 3 4 25.0% — — — —
18 — — — — — — — — — — — — — — — — — 2008 10 13 23 43.5% 4 5 9 44.4% 1 2 3 33.3% — — — —
19 2001 — — — — 5 3 8 62.5% — — — — 0 1 1 0.0% 2009 7 9 16 43.8% — — — — 0 3 3 0.0% — — — —
20 2002 0 2 2 0.0% 4 3 7 57.1% — — — — — — — — 2010 4 9 13 30.8% 0 2 2 0.0% 1 2 3 33.3% — — — —
21 2003 3 6 9 33.3% 11 11 22 50.0% 0 1 1 0.0% 0 1 1 0.0% 2011 1 5 6 16.7% 2 1 3 66.7% — — — — — — — —
22 2004 8 12 20 40.0% 13 9 22 59.1% 5 2 7 71.4% — — — — 2012 3 2 5 60.0% 1 2 3 33.3% — — — — — — — —
23 2005 16 11 27 59.3% 11 6 17 64.7% 5 1 6 83.3% 0 1 1 0.0% 2013 1 2 3 33.3% — — — — — — — — — — — —
24 2006 4 11 15 26.7% 4 7 11 36.4% 1 3 4 25.0% 1 1 2 50.0% 2014 1 6 7 14.3% — — — — — — — — — — — —
25 2007 5 7 12 41.7% 7 5 12 58.3% — — — — — — — — 2015 0 1 1 0.0% — — — — — — — — — — — —
26 2008 6 9 15 40.0% 15 10 25 60.0% 0 2 2 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
27 2009 1 7 8 12.5% 7 9 16 43.8% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
28 2010 12 11 23 52.2% 5 8 13 38.5% 3 1 4 75.0% — — — — — — — — — — — — — — — — — — — — —
29 2011 16 15 31 51.6% 10 7 17 58.8% 2 2 4 50.0% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
30 2012 8 12 20 40.0% 8 6 14 57.1% 5 3 8 62.5% 3 1 4 75.0% — — — — — — — — — — — — — — — — —
31 2013 17 16 33 51.5% 7 6 13 53.8% 2 2 4 50.0% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
32 2014 18 17 35 51.4% 4 6 10 40.0% 6 3 9 66.7% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
33 2015 5 14 19 26.3% 6 5 11 54.5% 3 3 6 50.0% — — — — — — — — — — — — — — — — — — — — —
34 2016 0 4 4 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 119 154 273 43.6% 117 101 218 53.7% 32 24 56 57.1% 7 9 16 43.8% — 37 60 97 38.1% 9 13 22 40.9% 3 11 14 21.4% — — — —

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.

Age Klara Koukalova Yung Jan Chan
Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak Pressure+ Schedule Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak Pressure+ Schedule
15 — — — — — — — — — — — — — — — — 2005 1499 114.7 +1.11 +4.59 0.658 42.3% — — — 0.0% -4.00 — — — -0.28
16 — — — — — — — — — — — — — — — — 2006 1526 114.7 -1.66 -2.19 0.766 43.8% +28 — — 53.8% +1.00 0–1 0–1 — +0.30
17 — — — — — — — — — — — — — — — — 2007 1573 120.6 -3.59 +0.50 0.909 47.8% -5 +2 -14 41.4% -0.60 2–6 (25%) 1–2 (33%) 94.6 -0.31
18 — — — — — — — — — — — — — — — — 2008 1607 124.5 -1.27 +0.65 0.945 48.9% -19 -17 -72 45.2% -0.43 6–8 (43%) 1–5 (17%) 97.0 -0.98
19 2001 1520 104.0 — — — — — +55 — 47.8% +0.26 4–1 (80%) 0–1 — +1.03 2009 1596 119.8 -1.78 +0.07 0.918 48.2% +14 — -91 39.5% -0.74 2–3 (40%) 1–1 — -1.09
20 2002 1527 105.4 — — — — — +71 — 50.0% -0.42 2–4 (33%) 1–0 — +0.68 2010 1532 109.8 -1.37 -2.21 0.844 46.3% +22 — -35 32.4% -1.00 1–2 (33%) 0–1 — +0.58
21 2003 1537 119.8 — — — — -60 +108 — 44.4% -0.35 7–8 (47%) 1–3 (25%) 99.1 +0.56 2011 1531 113.4 -2.22 +0.98 0.932 48.4% -16 +57 — 36.8% -0.58 0–3 (0%) 0–1 — -0.15
22 2004 1612 117.6 — — — — -110 +85 +30 49.5% -0.07 8–7 (53%) 6–4 (60%) 103.5 +0.67 2012 1584 120.9 -0.16 -0.50 0.955 49.0% -12 +11 — 50.0% +0.36 1–1 3–3 (50%) — -0.12
23 2005 1764 126.4 — — — — -90 +7 -18 55.5% +0.09 15–4 (79%) 9–2 (82%) 118.0 +1.13 2013 1583 111.3 -0.50 +0.31 1.001 50.5% -15 — — 37.5% +0.25 1–1 — — -0.15
24 2006 1547 107.1 — — — — +14 +77 +135 37.0% -1.05 2–7 (22%) 3–3 (50%) 92.0 +0.20 2014 1524 105.5 -2.36 -1.45 0.846 46.1% -15 — — 23.5% -1.71 1–2 (33%) 0–1 — -0.24
25 2007 1579 115.5 — — — — -13 +59 — 50.0% +0.06 3–5 (38%) 3–4 (43%) 98.3 +0.21 2015 1505 97.8 -1.75 +1.24 0.868 46.7% — — — 0.0% -1.50 — 0–1 — +0.18
26 2008 1574 111.3 — — — — -45 +84 — 48.5% -0.08 10–9 (53%) 3–5 (38%) 100.5 +0.48 — — — — — — — — — — — — — — — —
27 2009 1534 110.3 — — — — -72 +97 — 35.0% -0.95 5–5 (50%) 4–5 (44%) 100.5 -0.40 — — — — — — — — — — — — — — — —
28 2010 1657 126.4 — — — — -49 -66 +4 46.2% -0.20 10–5 (67%) 5–6 (45%) 106.2 +0.89 — — — — — — — — — — — — — — — —
29 2011 1713 131.7 — — — — -15 -60 -54 50.4% -0.03 13–6 (68%) 7–4 (64%) 109.2 +0.80 — — — — — — — — — — — — — — — —
30 2012 1721 128.0 — — — — -45 -9 -3 51.0% +0.17 10–6 (63%) 5–7 (42%) 103.3 -0.68 — — — — — — — — — — — — — — — —
31 2013 1676 139.6 — — — — -9 +65 +31 51.7% +0.15 9–9 (50%) 6–9 (40%) 95.7 -1.87 — — — — — — — — — — — — — — — —
32 2014 1612 127.9 -2.87 -0.03 0.906 47.8% +13 +61 +151 50.8% -0.13 10–8 (56%) 11–4 (73%) 104.3 -0.55 — — — — — — — — — — — — — — — —
33 2015 1549 110.8 -2.79 +1.36 0.935 48.1% -28 +101 +170 40.5% -0.84 2–6 (25%) 3–4 (43%) 95.0 -0.51 — — — — — — — — — — — — — — — —
34 2016 1486 101.6 -2.24 -1.27 0.765 45.0% -28 — — 27.3% -1.55 0–3 (0%) 0–1 — +0.16 — — — — — — — — — — — — — — — —
Career — 1804 125.9 -2.79 +0.55 0.910 47.8% -34 +51 +56 47.9% -0.19 110–93 (54%) 67–62 (52%) 106.6 +0.50 — 1636 125.8 -1.83 -0.02 0.910 48.0% -2 +3 -50 40.1% -0.58 14–27 (34%) 6–16 (27%) 87.7 -1.70

Career Rivalries

Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.