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

Zarina Diyas vs Klara Koukalova H2H: 2-0

Zarina Diyas holds a 2–0 lead over Klara Koukalova in their WTA head-to-head. Across 2 main-draw meetings, Zarina Diyas leads 2–0 on hard courts. Most recently, Zarina Diyas won the 2014 China Open round of 64 6-1 6-4.

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Zarina Diyas
Kazakhstan Age 32 Right-Handed 172 cm / 5'8"
H2H
2 – 0
2 main-draw meetings
Klara Koukalova
CZE Age 44 Right-Handed 166 cm / 5'5"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Zarina Diyas #39 6-1 6-4 Klara Koukalova #40 Match data Oct 1, 2014* R64 China Open Premier Mandatory → modern equivalent WTA 1000 Hard
Zarina Diyas #40 6-4 6-7(1) 6-2 Klara Koukalova #37 Match data Sep 24, 2014* R64 Wuhan Open Premier 5 → modern equivalent WTA 1000 Hard

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
Zarina Diyas #437 #31 1,495 1,756 99 128 43.6% 0 0 0 0 1 1
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 Zarina Diyas Klara Koukalova
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
15 2009 2–1 66.7% #242 1,528 0 0 — — — — — — —
16 2010 2–4 33.3% #172 1,539 0 0 — — — — — — —
17 2011 1–4 20.0% #227 1,504 0 0 — — — — — — —
18 2012 0–2 0.0% #264 1,477 0 0 — — — — — — —
19 2013 1–1 50.0% #163 1,477 0 0 2001 5–4 55.6% #139 1,519 0 0
20 2014 20–14 58.8% #33 1,682 0 0 2002 4–5 44.4% #117 1,527 0 0
21 2015 20–27 42.6% #52 1,560 0 0 2003 14–19 42.4% #63 1,537 0 0
22 2016 8–12 40.0% #150 1,552 0 0 2004 26–23 53.1% #46 1,611 0 0
23 2017 7–4 63.6% #66 1,665 0 1 2005 32–19 62.7% #35 1,764 0 2
24 2018 13–19 40.6% #89 1,717 0 1 2006 10–22 31.2% #117 1,546 0 2
25 2019 7–13 35.0% #77 1,704 0 1 2007 12–12 50.0% #63 1,578 0 2
26 2020 5–6 45.5% #80 1,659 0 1 2008 21–22 48.8% #72 1,574 0 2
27 2021 13–17 43.3% #102 1,688 0 1 2009 8–17 32.0% #90 1,533 0 2
28 2022 0–1 0.0% #1031 1,680 0 1 2010 20–20 50.0% #41 1,656 0 2
29 — — — — — — — 2011 29–25 53.7% #41 1,713 0 2
30 2024 0–2 0.0% #382 1,631 0 1 2012 24–22 52.2% #28 1,721 0 2
31 — — — — — — — 2013 27–25 51.9% #35 1,675 0 2
32 2026 0–1 0.0% #437 1,545 0 1 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 Zarina Diyas 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 %
15 2009 — — — — 2 1 3 66.7% — — — — — — — — — — — — — — — — — — — — — — — — —
16 2010 2 2 4 50.0% 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
17 2011 1 4 5 20.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
18 2012 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
19 2013 1 1 2 50.0% — — — — — — — — — — — — 2001 — — — — 5 3 8 62.5% — — — — 0 1 1 0.0%
20 2014 15 10 25 60.0% 2 2 4 50.0% 3 2 5 60.0% — — — — 2002 0 2 2 0.0% 4 3 7 57.1% — — — — — — — —
21 2015 11 17 28 39.3% 3 6 9 33.3% 6 4 10 60.0% — — — — 2003 3 6 9 33.3% 11 11 22 50.0% 0 1 1 0.0% 0 1 1 0.0%
22 2016 6 8 14 42.9% 2 3 5 40.0% 0 1 1 0.0% — — — — 2004 8 12 20 40.0% 13 9 22 59.1% 5 2 7 71.4% — — — —
23 2017 5 3 8 62.5% — — — — 2 1 3 66.7% — — — — 2005 16 11 27 59.3% 11 6 17 64.7% 5 1 6 83.3% 0 1 1 0.0%
24 2018 9 11 20 45.0% 4 7 11 36.4% 0 1 1 0.0% — — — — 2006 4 11 15 26.7% 4 7 11 36.4% 1 3 4 25.0% 1 1 2 50.0%
25 2019 6 10 16 37.5% 1 1 2 50.0% 0 2 2 0.0% — — — — 2007 5 7 12 41.7% 7 5 12 58.3% — — — — — — — —
26 2020 4 3 7 57.1% 1 3 4 25.0% — — — — — — — — 2008 6 9 15 40.0% 15 10 25 60.0% 0 2 2 0.0% 0 1 1 0.0%
27 2021 8 10 18 44.4% 4 5 9 44.4% 1 2 3 33.3% — — — — 2009 1 7 8 12.5% 7 9 16 43.8% 0 1 1 0.0% — — — —
28 2022 0 1 1 0.0% — — — — — — — — — — — — 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 2024 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 2026 0 1 1 0.0% — — — — — — — — — — — — 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 — 68 85 153 44.4% 19 30 49 38.8% 12 13 25 48.0% — — — — — 119 154 273 43.6% 117 101 218 53.7% 32 24 56 57.1% 7 9 16 43.8%

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 217/227 of Zarina Diyas's and 66/96 of Klara Koukalova'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 Zarina Diyas Klara Koukalova
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%
15 2009 2/3 3.0 2.5 53.3% 69.6% 41.1% 60.7% 64.6% 56.3% 58.9% — —/— — — — — — — — — —
16 2010 6/6 1.8 5.8 57.9% 62.6% 42.3% 41.2% 52.3% 53.9% 40.8% — —/— — — — — — — — — —
17 2011 5/5 2.6 4.2 61.8% 61.5% 40.9% 48.2% 59.0% 54.1% 40.1% — —/— — — — — — — — — —
18 2012 2/2 0.0 7.5 42.5% 60.7% 29.5% 23.6% 45.0% 41.7% 43.1% — —/— — — — — — — — — —
19 2013 2/2 4.0 3.0 68.2% 67.7% 55.4% 61.1% 72.7% 64.6% 35.8% — —/— — — — — — — — — —
20 2014 32/34 1.6 3.1 68.2% 58.4% 47.3% 49.4% 51.1% 55.1% 45.8% — —/— — — — — — — — — —
21 2015 41/47 1.2 3.3 71.2% 57.9% 47.0% 48.3% 51.6% 54.7% 44.1% — —/— — — — — — — — — —
22 2016 20/20 2.6 2.6 70.3% 60.5% 41.6% 48.5% 49.8% 54.9% 43.9% — —/— — — — — — — — — —
23 2017 11/11 3.3 3.5 68.1% 64.5% 46.2% 53.5% 57.0% 58.7% 45.1% — —/— — — — — — — — — —
24 2018 32/32 2.2 3.0 67.3% 61.4% 48.3% 52.6% 44.3% 56.7% 42.8% — —/— — — — — — — — — —
25 2019 20/20 0.9 2.4 69.6% 59.4% 44.8% 45.3% 36.7% 55.0% 42.1% — —/— — — — — — — — — —
26 2020 11/11 1.6 2.8 74.3% 57.0% 47.6% 53.8% 48.6% 54.4% 44.2% — —/— — — — — — — — — —
27 2021 29/30 1.5 3.1 67.2% 60.0% 42.6% 48.1% 46.7% 54.3% 41.3% — —/— — — — — — — — — —
28 2022 1/1 0.0 1.0 70.2% 56.2% 67.7% 66.7% 20.0% 59.6% 33.6% — —/— — — — — — — — — —
30 2024 2/2 0.0 1.5 70.9% 46.7% 31.4% 45.5% 38.8% 42.6% 40.0% — —/— — — — — — — — — —
32 2026 1/1 1.0 3.0 68.3% 61.0% 31.6% 55.6% 20.0% 51.7% 36.4% 2014 31/56 1.8 5.0 55.4% 61.0% 41.7% 47.6% 48.1% 51.9% 43.5%
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 — 217/227 1.7 3.1 68.4% 59.8% 45.4% 49.3% 48.4% 55.1% 43.4% — 66/563 1.2 5.4 55.5% 60.8% 44.2% 46.1% 49.2% 53.1% 42.7%

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 Zarina Diyas 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
15 2009 1528 105.5 +0.98 +1.13 1.348 57.6% — +48 — 66.7% +1.00 — — — +0.06 — — — — — — — — — — — — — — — —
16 2010 1539 114.4 +0.14 -1.62 0.883 47.6% +19 — — 40.0% -1.00 1–2 (33%) 3–1 (75%) 100.8 -0.06 — — — — — — — — — — — — — — — —
17 2011 1505 103.6 -1.72 -1.18 0.875 47.5% +17 — — 33.3% -1.08 0–2 — — +0.16 — — — — — — — — — — — — — — — —
18 2012 1477 95.3 -2.37 -3.62 0.739 42.4% — — — 0.0% -3.50 — — — +0.11 — — — — — — — — — — — — — — — —
19 2013 1478 100.3 -1.99 -0.40 1.012 50.7% — — — 40.0% +0.60 1–0 0–2 — +0.31 2001 1520 104.0 — — — — — +55 — 47.8% +0.26 4–1 (80%) 0–1 — +1.03
20 2014 1683 130.0 -0.83 +1.87 1.021 50.5% -29 -121 -28 57.5% +0.52 7–2 (78%) 7–4 (64%) 111.0 +0.75 2002 1527 105.4 — — — — — +71 — 50.0% -0.42 2–4 (33%) 1–0 — +0.68
21 2015 1561 125.0 -2.62 +2.02 0.975 49.5% -15 -26 +133 47.0% -0.32 3–9 (25%) 4–5 (44%) 91.8 +1.00 2003 1537 119.8 — — — — -60 +108 — 44.4% -0.35 7–8 (47%) 1–3 (25%) 99.1 +0.56
22 2016 1553 119.4 -0.44 +0.63 0.974 49.5% +1 -18 — 42.6% -0.34 3–4 (43%) 1–3 (25%) 98.7 +0.38 2004 1612 117.6 — — — — -110 +85 +30 49.5% -0.07 8–7 (53%) 6–4 (60%) 103.5 +0.67
23 2017 1665 121.5 +1.12 +0.16 1.091 52.1% +6 — +15 57.7% +0.73 3–1 (75%) 1–3 (25%) 102.1 +0.69 2005 1764 126.4 — — — — -90 +7 -18 55.5% +0.09 15–4 (79%) 9–2 (82%) 118.0 +1.13
24 2018 1718 138.2 -0.01 -0.24 0.989 49.8% +12 -125 — 44.9% -0.07 4–5 (44%) 2–4 (33%) 97.3 -2.35 2006 1547 107.1 — — — — +14 +77 +135 37.0% -1.05 2–7 (22%) 3–3 (50%) 92.0 +0.20
25 2019 1704 128.4 -1.13 -1.09 0.937 48.5% +30 — — 44.2% -0.58 0–5 (0%) 0–1 — -0.02 2007 1579 115.5 — — — — -13 +59 — 50.0% +0.06 3–5 (38%) 3–4 (43%) 98.3 +0.21
26 2020 1660 115.9 -0.51 +0.34 0.969 49.6% +68 -136 — 44.8% -0.24 4–3 (57%) 1–4 (20%) 98.0 -0.43 2008 1574 111.3 — — — — -45 +84 — 48.5% -0.08 10–9 (53%) 3–5 (38%) 100.5 +0.48
27 2021 1688 125.7 -1.93 -1.44 0.902 47.7% +47 -117 -89 43.8% -0.62 6–2 (75%) 2–1 (67%) 105.9 -1.46 2009 1534 110.3 — — — — -72 +97 — 35.0% -0.95 5–5 (50%) 4–5 (44%) 100.5 -0.40
28 2022 1681 107.4 -0.79 +5.23 0.833 45.9% — — — 33.3% -1.67 0–1 1–1 — -0.23 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 2024 1631 100.1 -0.16 -2.90 0.697 41.4% — — — 0.0% -3.25 — — — +0.15 2012 1721 128.0 — — — — -45 -9 -3 51.0% +0.17 10–6 (63%) 5–7 (42%) 103.3 -0.68
31 2025 1549 101.2 — — — — — — — — — — — — — 2013 1676 139.6 — — — — -9 +65 +31 51.7% +0.15 9–9 (50%) 6–9 (40%) 95.7 -1.87
32 2026 1546 107.0 -0.57 -1.68 0.752 43.7% — — — 0.0% -3.00 — — — -0.12 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 — 1756 131.4 -1.07 +0.30 0.966 49.3% +8 -81 +46 46.2% -0.25 32–36 (47%) 22–29 (43%) 97.4 -0.47 — 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.