H2H data updated: 2026-09-01 00:00 UTC

Polona Hercog vs Klara Koukalova H2H: 4-0

Polona Hercog holds a 4–0 lead over Klara Koukalova in their WTA head-to-head. Across 4 main-draw meetings, Polona Hercog leads 4–0 on clay. Most recently, Polona Hercog won the 2014 Nuremberg round of 32 1-6 6-2 6-1.

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Polona Hercog
Slovenia Age 35 Right-Handed 185 cm / 6'1"
H2H
4 – 0
4 main draw meetings
Klara Koukalova
CZE Age 44 Right-Handed 166 cm / 5'5"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Polona Hercog #61 1-6 6-2 6-1 Klara Koukalova #31 Match data May 22, 2014* R32 Nuremberg International → modern equivalent WTA 250 Clay
Polona Hercog #100 6-3 4-6 6-1 Klara Koukalova #33 Match data Jun 13, 2013* R32 Nuremberg International → modern equivalent WTA 250 Clay
Polona Hercog #37 6-1 6-1 Klara Koukalova #36 Match data Jul 16, 2011* QF Palermo International → modern equivalent WTA 250 Clay
Polona Hercog #86 7-5 6-4 Klara Koukalova #122 Match data Jul 16, 2009* R32 Prague International → modern equivalent WTA 250 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
Polona Hercog #236 #35 1,605 1,767 170 214 44.3% 0 0 0 0 3 3
Klara Koukalova #566 #20 1,860 1,803 275 288 48.8% 0 0 0 0 3 3

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 Polona Hercog Klara Koukalova
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 2007 0–1 0.0% #375 1,488 0 0 — — — — — — —
17 2008 0–2 0.0% #245 1,470 0 0 — — — — — — —
18 2009 6–8 42.9% #68 1,501 0 0 — — — — — — —
19 2010 26–24 52.0% #47 1,633 0 0 2001 5–4 55.6% #139 1,519 0 0
20 2011 27–25 51.9% #36 1,698 0 1 2002 4–5 44.4% #117 1,527 0 0
21 2012 14–21 40.0% #76 1,665 0 2 2003 14–19 42.4% #63 1,537 0 0
22 2013 10–10 50.0% #65 1,673 0 2 2004 26–23 53.1% #46 1,611 0 0
23 2014 12–16 42.9% #97 1,638 0 2 2005 32–19 62.7% #35 1,764 0 2
24 2015 19–23 45.2% #73 1,606 0 2 2006 10–22 31.2% #117 1,546 0 2
25 2016 10–18 35.7% #143 1,558 0 2 2007 12–12 50.0% #63 1,578 0 2
26 2017 2–2 50.0% #101 1,571 0 2 2008 21–22 48.8% #72 1,574 0 2
27 2018 15–19 44.1% #85 1,623 0 2 2009 8–17 32.0% #90 1,533 0 2
28 2019 19–21 47.5% #49 1,715 0 3 2010 20–20 50.0% #41 1,656 0 2
29 2020 6–8 42.9% #49 1,684 0 3 2011 29–25 53.7% #41 1,713 0 2
30 2021 4–15 21.1% #134 1,589 0 3 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
35 2026 0–1 0.0% #236 1,597 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 Polona Hercog Klara Koukalova
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 %
16 2007 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
17 2008 0 1 1 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
18 2009 1 4 5 20.0% 5 4 9 55.6% — — — — — — — — — — — — — — — — — — — — — — — — —
19 2010 13 13 26 50.0% 13 10 23 56.5% 0 1 1 0.0% — — — — 2001 — — — — 5 3 8 62.5% — — — — 0 1 1 0.0%
20 2011 10 14 24 41.7% 16 9 25 64.0% 1 2 3 33.3% — — — — 2002 0 2 2 0.0% 4 3 7 57.1% — — — — — — — —
21 2012 4 12 16 25.0% 10 6 16 62.5% 0 2 2 0.0% 0 1 1 0.0% 2003 3 6 9 33.3% 11 11 22 50.0% 0 1 1 0.0% 0 1 1 0.0%
22 2013 7 8 15 46.7% 3 2 5 60.0% — — — — — — — — 2004 8 12 20 40.0% 13 9 22 59.1% 5 2 7 71.4% — — — —
23 2014 3 8 11 27.3% 8 6 14 57.1% 1 2 3 33.3% — — — — 2005 16 11 27 59.3% 11 6 17 64.7% 5 1 6 83.3% 0 1 1 0.0%
24 2015 10 15 25 40.0% 8 6 14 57.1% 1 2 3 33.3% — — — — 2006 4 11 15 26.7% 4 7 11 36.4% 1 3 4 25.0% 1 1 2 50.0%
25 2016 1 8 9 11.1% 9 7 16 56.3% 0 3 3 0.0% — — — — 2007 5 7 12 41.7% 7 5 12 58.3% — — — — — — — —
26 2017 — — — — 0 1 1 0.0% 2 1 3 66.7% — — — — 2008 6 9 15 40.0% 15 10 25 60.0% 0 2 2 0.0% 0 1 1 0.0%
27 2018 4 9 13 30.8% 10 7 17 58.8% 1 3 4 25.0% — — — — 2009 1 7 8 12.5% 7 9 16 43.8% 0 1 1 0.0% — — — —
28 2019 6 14 20 30.0% 8 4 12 66.7% 5 3 8 62.5% — — — — 2010 12 11 23 52.2% 5 8 13 38.5% 3 1 4 75.0% — — — —
29 2020 1 2 3 33.3% 5 6 11 45.5% — — — — — — — — 2011 16 15 31 51.6% 10 7 17 58.8% 2 2 4 50.0% 1 1 2 50.0%
30 2021 2 8 10 20.0% 2 5 7 28.6% 0 2 2 0.0% — — — — 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% — — — — — — — — — — — —
35 2026 — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 62 117 179 34.6% 97 75 172 56.4% 11 21 32 34.4% 0 1 1 0.0% — 119 154 273 43.6% 117 101 218 53.7% 32 24 56 57.1% 7 9 16 43.8%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. 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 Polona Hercog Klara Koukalova
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
16 2007 1489 100.3 -2.72 -1.27 0.816 46.1% — — — 33.3% -1.33 0–1 1–0 — -0.06 — — — — — — — — — — — — — — — —
17 2008 1470 102.5 -2.06 -1.94 0.805 44.4% — — — 20.0% -1.20 0–1 — — -0.18 — — — — — — — — — — — — — — — —
18 2009 1501 106.8 +0.29 -3.10 0.898 48.1% -40 +89 — 40.6% -0.53 3–1 (75%) 1–2 (33%) — +0.08 — — — — — — — — — — — — — — — —
19 2010 1634 130.1 +2.35 -0.89 1.024 50.4% -68 +49 — 50.0% +0.14 4–8 (33%) 1–2 (33%) — -0.18 2001 1520 104.0 — — — — — +55 — 47.8% +0.26 4–1 (80%) 0–1 — +1.03
20 2011 1699 128.3 +1.64 -2.16 0.985 49.5% -94 +106 -139 51.3% +0.03 9–6 (60%) 5–8 (38%) — -0.20 2002 1527 105.4 — — — — — +71 — 50.0% -0.42 2–4 (33%) 1–0 — +0.68
21 2012 1666 121.2 -0.89 -2.18 0.897 47.5% -100 +153 — 40.3% -0.94 4–3 (57%) 3–4 (43%) — -1.34 2003 1537 119.8 — — — — -60 +108 — 44.4% -0.35 7–8 (47%) 1–3 (25%) — +0.56
22 2013 1674 131.4 +2.50 +0.02 1.065 51.3% -74 +126 — 52.2% +0.52 2–6 (25%) 1–6 (14%) — -0.86 2004 1612 117.6 — — — — -110 +85 +30 49.5% -0.07 8–7 (53%) 6–4 (60%) — +0.67
23 2014 1639 121.6 -0.49 -2.45 0.903 48.0% -47 +97 -116 43.5% -0.42 5–3 (63%) 3–5 (38%) — -1.81 2005 1764 126.4 — — — — -90 +7 -18 55.5% +0.09 15–4 (79%) 9–2 (82%) — +1.13
24 2015 1606 121.6 +1.66 -0.91 1.034 50.7% -33 +93 -84 49.5% -0.03 5–14 (26%) 4–5 (44%) — +0.24 2006 1547 107.1 — — — — +14 +77 +135 37.0% -1.05 2–7 (22%) 3–3 (50%) — +0.20
25 2016 1559 116.5 -2.35 +0.40 0.926 48.3% -25 +109 -113 42.4% -0.37 2–5 (29%) 4–1 (80%) — -1.05 2007 1579 115.5 — — — — -13 +59 — 50.0% +0.06 3–5 (38%) 3–4 (43%) — +0.21
26 2017 1571 105.5 +0.02 -1.25 1.118 51.8% — — -87 50.0% +0.60 1–1 0–2 — +0.25 2008 1574 111.3 — — — — -45 +84 — 48.5% -0.08 10–9 (53%) 3–5 (38%) — +0.48
27 2018 1624 119.4 -0.20 -1.09 0.959 49.0% -61 +57 -123 45.8% -0.32 3–5 (38%) 3–4 (43%) — -0.53 2009 1534 110.3 — — — — -72 +97 — 35.0% -0.95 5–5 (50%) 4–5 (44%) — -0.40
28 2019 1715 133.2 +1.87 -1.25 0.983 49.7% -111 +63 -107 47.9% -0.16 8–10 (44%) 6–10 (38%) — -0.38 2010 1657 126.4 — — — — -49 -66 +4 46.2% -0.20 10–5 (67%) 5–6 (45%) — +0.89
29 2020 1685 125.8 +0.14 +0.43 0.991 50.0% -59 +53 — 48.5% -0.03 1–4 (20%) 0–3 (0%) — +0.33 2011 1713 131.7 — — — — -15 -60 -54 50.4% -0.03 13–6 (68%) 7–4 (64%) — +0.80
30 2021 1590 121.5 -0.67 -1.96 0.871 46.9% -38 +130 — 30.4% -1.39 2–6 (25%) 0–4 (0%) — -1.36 2012 1721 128.0 — — — — -45 -9 -3 51.0% +0.17 10–6 (63%) 5–7 (42%) — -0.68
31 2022 1573 — — — — — — — — — — — — — — 2013 1676 139.6 — — — — -9 +65 +31 51.7% +0.15 9–9 (50%) 6–9 (40%) — -1.87
32 2023 1581 — — — — — — — — — — — — — — 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%) — -0.55
33 2024 1577 99.9 — — — — — — — — — — — — — 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%) — -0.51
34 2025 1620 — — — — — — — — — — — — — — 2016 1486 101.6 -2.24 -1.27 0.765 45.0% -28 — — 27.3% -1.55 0–3 (0%) 0–1 — +0.16
35 2026 1597 101.0 -0.52 -0.69 0.381 40.0% — — — — — — — — -0.19 — — — — — — — — — — — — — — — —
Career — 1767 129.4 +0.66 -1.31 0.965 49.2% -68 +90 -110 46.2% -0.23 49–74 (40%) 32–56 (36%) 87.4 -1.91 — 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

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.