H2H data updated: 2026-09-14 00:00 UTC

Klara Koukalova vs Nadia Petrova H2H: 2-2

Klara Koukalova and Nadia Petrova are tied 2–2 in their WTA head-to-head. Across 4 main-draw meetings, Klara Koukalova leads 2–1 on hard courts, while Nadia Petrova leads 1–0 on clay. Most recently, Klara Koukalova won the 2011 China Open round of 64 6-3 6-7(3) 6-1.

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Klara Koukalova
Czech Republic Age 44 Right-Handed 166 cm / 5'5"
H2H
2 – 2
4 main-draw meetings
Nadia Petrova
RUS Age 44 Right-Handed 178 cm / 5'10"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Klara Koukalova #42 6-3 6-7(3) 6-1 Nadia Petrova #31 Match data Oct 5, 2011* R64 China Open Premier Mandatory → modern equivalent WTA 1000 Hard
Klara Koukalova #39 5-4 (ret.) Nadia Petrova #19 Match data Sep 25, 2010* SF Korea Open International → modern equivalent WTA 250 Hard
Nadia Petrova #9 6-2 6-4 Klara Koukalova #33 Match data Aug 12, 2005* R16 Los Angeles Tier II → modern equivalent WTA 500 Hard
Nadia Petrova #12 7-5 6-4 Klara Koukalova #41 Match data May 5, 2005* R32 Berlin Open Tier I → modern equivalent WTA 1000 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
Nadia Petrova #578 #3 3,882 2,089 444 278 61.5% 0 3 1 5 4 13

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 Nadia Petrova
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 — — — — — — — 1998 2–2 50.0% #145 1,536 0 0
17 — — — — — — — 1999 3–5 37.5% #93 1,567 0 0
18 — — — — — — — 2000 12–15 44.4% #60 1,624 0 0
19 2001 5–4 55.6% #139 1,519 0 0 2001 20–21 48.8% #39 1,682 0 0
20 2002 4–5 44.4% #117 1,527 0 0 2002 7–5 58.3% #112 1,745 0 0
21 2003 14–19 42.4% #63 1,537 0 0 2003 36–20 64.3% #12 1,921 0 0
22 2004 26–23 53.1% #46 1,611 0 0 2004 40–25 61.5% #12 1,879 0 0
23 2005 32–19 62.7% #35 1,764 0 2 2005 56–25 69.1% #9 1,971 0 1
24 2006 10–22 31.2% #117 1,546 0 2 2006 48–19 71.6% #6 1,999 0 6
25 2007 12–12 50.0% #63 1,578 0 2 2007 37–18 67.3% #14 1,918 0 7
26 2008 21–22 48.8% #72 1,574 0 2 2008 47–24 66.2% #11 1,925 0 9
27 2009 8–17 32.0% #90 1,533 0 2 2009 30–21 58.8% #20 1,824 0 9
28 2010 20–20 50.0% #41 1,656 0 2 2010 32–20 61.5% #15 1,852 0 9
29 2011 29–25 53.7% #41 1,713 0 2 2011 25–21 54.3% #29 1,786 0 10
30 2012 24–22 52.2% #28 1,721 0 2 2012 39–19 67.2% #12 1,933 0 13
31 2013 27–25 51.9% #35 1,675 0 2 2013 9–13 40.9% #104 1,725 0 13
32 2014 29–27 51.8% #40 1,611 0 3 2014 1–5 16.7% #362 1,656 0 13
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 Nadia Petrova
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 — — — — — — — — — — — — — — — — — 1998 — — — — 1 1 2 50.0% — — — — 1 1 2 50.0%
17 — — — — — — — — — — — — — — — — — 1999 0 1 1 0.0% 0 1 1 0.0% 1 1 2 50.0% 2 2 4 50.0%
18 — — — — — — — — — — — — — — — — — 2000 8 5 13 61.5% 1 5 6 16.7% 2 3 5 40.0% 1 2 3 33.3%
19 2001 — — — — 5 3 8 62.5% — — — — 0 1 1 0.0% 2001 8 11 19 42.1% 9 5 14 64.3% 3 3 6 50.0% 0 2 2 0.0%
20 2002 0 2 2 0.0% 4 3 7 57.1% — — — — — — — — 2002 4 3 7 57.1% — — — — — — — — 3 2 5 60.0%
21 2003 3 6 9 33.3% 11 11 22 50.0% 0 1 1 0.0% 0 1 1 0.0% 2003 20 11 31 64.5% 9 4 13 69.2% 5 2 7 71.4% 2 3 5 40.0%
22 2004 8 12 20 40.0% 13 9 22 59.1% 5 2 7 71.4% — — — — 2004 28 16 44 63.6% 8 5 13 61.5% 3 3 6 50.0% 1 1 2 50.0%
23 2005 16 11 27 59.3% 11 6 17 64.7% 5 1 6 83.3% 0 1 1 0.0% 2005 34 17 51 66.7% 15 5 20 75.0% 5 2 7 71.4% 2 1 3 66.7%
24 2006 4 11 15 26.7% 4 7 11 36.4% 1 3 4 25.0% 1 1 2 50.0% 2006 28 16 44 63.6% 15 1 16 93.8% — — — — 5 2 7 71.4%
25 2007 5 7 12 41.7% 7 5 12 58.3% — — — — — — — — 2007 20 11 31 64.5% 8 5 13 61.5% 5 2 7 71.4% 4 0 4 100.0%
26 2008 6 9 15 40.0% 15 10 25 60.0% 0 2 2 0.0% 0 1 1 0.0% 2008 34 17 51 66.7% 5 4 9 55.6% 8 2 10 80.0% 0 1 1 0.0%
27 2009 1 7 8 12.5% 7 9 16 43.8% 0 1 1 0.0% — — — — 2009 17 13 30 56.7% 9 6 15 60.0% 4 2 6 66.7% — — — —
28 2010 12 11 23 52.2% 5 8 13 38.5% 3 1 4 75.0% — — — — 2010 17 14 31 54.8% 12 4 16 75.0% 3 2 5 60.0% — — — —
29 2011 16 15 31 51.6% 10 7 17 58.8% 2 2 4 50.0% 1 1 2 50.0% 2011 18 13 31 58.1% 3 5 8 37.5% 3 2 5 60.0% 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% 2012 20 11 31 64.5% 10 6 16 62.5% 9 2 11 81.8% — — — —
31 2013 17 16 33 51.5% 7 6 13 53.8% 2 2 4 50.0% 1 1 2 50.0% 2013 7 7 14 50.0% 2 4 6 33.3% 0 2 2 0.0% — — — —
32 2014 18 17 35 51.4% 4 6 10 40.0% 6 3 9 66.7% 1 1 2 50.0% 2014 1 4 5 20.0% 0 1 1 0.0% — — — — — — — —
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% — 264 170 434 60.8% 107 62 169 63.3% 51 28 79 64.6% 22 18 40 55.0%

Performance Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 66/96 of Klara Koukalova's and 414/630 of Nadia Petrova's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.

Age Klara Koukalova Nadia Petrova
Yr Sample Aces/M DFs/M 1st Sv% 1st Pts% 2nd Pts% BP Saved% BP Conv% Svc Pts% Ret Pts% Yr Sample Aces/M DFs/M 1st Sv% 1st Pts% 2nd Pts% BP Saved% BP Conv% Svc Pts% Ret Pts%
21 — —/— — — — — — — — — — 2003 12/56 3.7 3.3 56.6% 70.3% 47.3% 61.6% 49.4% 60.0% 51.0%
22 — —/— — — — — — — — — — 2004 10/65 4.7 4.2 56.8% 69.4% 49.1% 44.6% 40.1% 60.7% 44.9%
23 — —/— — — — — — — — — — 2005 22/81 3.9 3.4 60.3% 69.7% 48.9% 61.7% 50.8% 61.3% 47.2%
24 — —/— — — — — — — — — — 2006 50/67 5.1 2.7 61.5% 71.4% 51.1% 58.4% 48.2% 63.7% 47.6%
25 — —/— — — — — — — — — — 2007 49/55 4.4 3.1 61.8% 71.9% 48.2% 58.1% 47.0% 62.6% 45.1%
26 — —/— — — — — — — — — — 2008 63/71 4.7 3.7 60.3% 70.4% 44.7% 57.0% 53.9% 60.4% 45.5%
27 — —/— — — — — — — — — — 2009 47/51 6.2 3.7 58.3% 70.3% 46.5% 50.8% 44.7% 60.2% 42.2%
28 — —/— — — — — — — — — — 2010 47/52 6.2 3.3 57.1% 71.5% 48.2% 63.1% 51.9% 61.5% 43.1%
29 — —/— — — — — — — — — — 2011 41/46 4.2 3.0 58.5% 66.6% 48.1% 55.9% 52.2% 59.1% 42.1%
30 — —/— — — — — — — — — — 2012 45/58 6.0 3.0 55.3% 70.5% 46.7% 51.0% 48.8% 60.0% 44.4%
31 — —/— — — — — — — — — — 2013 22/22 6.3 3.0 60.4% 67.2% 41.1% 51.9% 43.8% 57.1% 44.5%
32 2014 31/56 1.8 5.0 55.4% 61.0% 41.7% 47.6% 48.1% 51.9% 43.5% 2014 6/6 5.3 5.5 46.7% 66.9% 45.9% 48.3% 39.9% 54.2% 42.2%
33 2015 31/36 0.7 5.5 55.6% 60.9% 46.7% 43.3% 48.1% 54.4% 42.6% — —/— — — — — — — — — —
34 2016 4/4 0.3 7.3 56.6% 57.9% 44.2% 56.5% 65.5% 52.2% 36.5% — —/— — — — — — — — — —
Career — 66/563 1.2 5.4 55.5% 60.8% 44.2% 46.1% 49.2% 53.1% 42.7% — 414/722 5.2 3.3 58.9% 70.2% 47.3% 56.2% 49.0% 60.8% 44.7%

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 Nadia Petrova
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 — — — — — — — — — — — — — — — — 1998 1536 108.3 — — — — — — — 40.0% -1.10 2–0 1–1 — -0.21
17 — — — — — — — — — — — — — — — — 1999 1568 119.8 — — — — +27 — — 38.9% -1.06 1–1 1–0 — -0.10
18 — — — — — — — — — — — — — — — — 2000 1625 137.4 — — — — +80 -140 -67 48.4% +0.27 4–8 (33%) 1–4 (20%) 94.3 -0.47
19 2001 1520 104.0 — — — — — +55 — 47.8% +0.26 4–1 (80%) 0–1 — +1.03 2001 1683 138.0 — — — — -59 -20 -54 49.4% +0.35 5–6 (45%) 2–11 (15%) 96.0 -0.89
20 2002 1527 105.4 — — — — — +71 — 50.0% -0.42 2–4 (33%) 1–0 — +0.68 2002 1745 137.3 — — — — -48 — — 59.1% +0.68 1–1 1–1 — -1.69
21 2003 1537 119.8 — — — — -60 +108 — 44.4% -0.35 7–8 (47%) 1–3 (25%) 99.1 +0.56 2003 1922 156.8 +3.29 +4.32 1.277 55.5% -51 -85 -174 61.1% +0.92 11–9 (55%) 6–2 (75%) 105.2 -2.56
22 2004 1612 117.6 — — — — -110 +85 +30 49.5% -0.07 8–7 (53%) 6–4 (60%) 103.5 +0.67 2004 1880 151.4 +3.04 +0.66 1.141 52.4% +11 -49 -143 61.4% +1.02 8–11 (42%) 7–7 (50%) 95.7 +1.78
23 2005 1764 126.4 — — — — -90 +7 -18 55.5% +0.09 15–4 (79%) 9–2 (82%) 118.0 +1.13 2005 1971 156.3 +4.70 +2.81 1.221 54.3% -26 +29 -176 69.4% +1.41 13–10 (57%) 7–6 (54%) 102.6 +1.08
24 2006 1547 107.1 — — — — +14 +77 +135 37.0% -1.05 2–7 (22%) 3–3 (50%) 92.0 +0.20 2006 1999 165.0 +7.12 +3.75 1.310 55.6% -34 +105 — 70.3% +1.75 9–6 (60%) 7–4 (64%) 102.2 +2.64
25 2007 1579 115.5 — — — — -13 +59 — 50.0% +0.06 3–5 (38%) 3–4 (43%) 98.3 +0.21 2007 1918 152.6 +6.15 +2.04 1.205 53.8% +19 +124 -43 68.2% +1.44 9–3 (75%) 7–7 (50%) 101.3 -0.25
26 2008 1574 111.3 — — — — -45 +84 — 48.5% -0.08 10–9 (53%) 3–5 (38%) 100.5 +0.48 2008 1926 146.0 +4.49 +1.77 1.149 53.0% -16 +1 +21 66.9% +1.29 7–11 (39%) 9–5 (64%) 94.7 +0.54
27 2009 1534 110.3 — — — — -72 +97 — 35.0% -0.95 5–5 (50%) 4–5 (44%) 100.5 -0.40 2009 1825 141.7 +4.11 -1.32 1.060 51.1% +14 +37 +87 54.4% +0.50 14–8 (64%) 8–6 (57%) 100.8 +1.28
28 2010 1657 126.4 — — — — -49 -66 +4 46.2% -0.20 10–5 (67%) 5–6 (45%) 106.2 +0.89 2010 1853 154.1 +4.92 +0.47 1.120 52.6% -39 +99 +61 62.1% +0.91 10–8 (56%) 2–5 (29%) 97.3 -0.43
29 2011 1713 131.7 — — — — -15 -60 -54 50.4% -0.03 13–6 (68%) 7–4 (64%) 109.2 +0.80 2011 1787 136.6 +2.64 -0.57 1.028 50.6% -5 +48 +103 56.6% +0.32 5–6 (45%) 8–5 (62%) 97.5 +0.59
30 2012 1721 128.0 — — — — -45 -9 -3 51.0% +0.17 10–6 (63%) 5–7 (42%) 103.3 -0.68 2012 1933 142.8 +3.66 +1.17 1.111 52.0% -27 -100 +6 63.6% +0.94 13–6 (68%) 8–9 (47%) 102.3 +2.25
31 2013 1676 139.6 — — — — -9 +65 +31 51.7% +0.15 9–9 (50%) 6–9 (40%) 95.7 -1.87 2013 1725 130.0 +1.40 +0.62 1.039 50.4% +95 +39 — 44.2% +0.10 3–5 (38%) 1–4 (20%) 94.3 +0.77
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 2014 1656 109.1 -1.13 -0.85 0.922 47.9% +85 — — 30.8% -1.15 1–2 (33%) 0–1 — -0.14
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 — 2089 155.3 +4.43 +1.25 1.140 52.7% -11 +13 -35 61.1% +0.92 116–101 (53%) 76–78 (49%) 96.4 +0.59

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.