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

Caroline Wozniacki vs Serena Williams H2H: 1-10

Serena Williams holds a 10–1 lead over Caroline Wozniacki in their WTA head-to-head. Across 11 main-draw meetings, Serena Williams leads 8–1 on hard courts and 1–0 on clay. Most recently, Serena Williams won the 2014 WTA Finals semifinal 2-6 6-3 7-6(6).

Denmark Age 36 Right-Handed 177 cm / 5'10"
H2H
1 10
11 main-draw meetings
USA Age 44 Right-Handed 175 cm / 5'9"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Serena Williams #1 2-6 6-3 7-6(6) Caroline Wozniacki #8 Match data Oct 27, 2014* SF WTA Finals WTA Finals Hard
Serena Williams #1 6-3 6-3 Caroline Wozniacki #11 Match data Sep 7, 2014* F US Open Grand Slam Hard
Serena Williams #1 2-6 6-2 6-4 Caroline Wozniacki #12 Match data Aug 16, 2014* SF Cincinnati Open Premier 5 modern equivalent WTA 1000 Hard
Serena Williams #1 4-6 7-5 7-5 Caroline Wozniacki #13 Match data Aug 9, 2014* QF Canadian Open Premier 5 modern equivalent WTA 1000 Hard
Serena Williams #1 6-1 6-4 Caroline Wozniacki #8 Match data Oct 5, 2013* QF China Open Premier Mandatory modern equivalent WTA 1000 Hard
Serena Williams #4 6-0 6-3 Caroline Wozniacki #8 Match data Aug 3, 2012* QF London Olympics Olympics Grass
Serena Williams #9 1-6 6-3 6-2 Caroline Wozniacki #6 Match data May 11, 2012* R16 Madrid Open Premier Mandatory modern equivalent WTA 1000 Clay
Caroline Wozniacki #6 6-4 6-4 Serena Williams #11 Match data Mar 24, 2012* QF Miami Open Premier Mandatory modern equivalent WTA 1000 Hard
Serena Williams #27 6-2 6-4 Caroline Wozniacki #1 Match data Sep 10, 2011* SF US Open Grand Slam Hard
Serena Williams #2 6-4 0-1 (ret.) Caroline Wozniacki #4 Match data Nov 1, 2009* SF WTA Finals WTA Finals Hard
Serena Williams #2 6-7(5) 6-3 7-6(3) Caroline Wozniacki #12 Match data Jan 17, 2009* QF Sydney International Premier modern equivalent WTA 500 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 Olympics 1000 including documented historical predecessor categories Finals 500 including documented historical predecessor categories 250 including documented historical predecessor categories Titles
Caroline Wozniacki #289 #1 10,255 2,154 620 275 69.3% 1 0 6 1 11 11 30
Serena Williams #320 #1 13,615 2,399 837 172 83.0% 23 1 23 6 18 2 73

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 Caroline Wozniacki Serena Williams
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
14 2005 0–2 0.0% 1,482 0 0
15 2006 4–4 50.0% #231 1,527 0 0 1997 3–2 60.0% #101 1,582 0 0
16 2007 12–15 44.4% #60 1,555 0 0 1998 26–11 70.3% #20 1,893 0 0
17 2008 53–20 72.6% #12 1,913 0 3 1999 38–7 84.4% #4 2,189 1 5
18 2009 66–25 72.5% #4 1,898 0 6 2000 37–8 82.2% #6 2,184 1 8
19 2010 63–17 78.8% #1 2,105 0 12 2001 40–7 85.1% #6 2,237 1 11
20 2011 63–17 78.8% #1 1,988 0 18 2002 57–5 91.9% #1 2,339 4 19
21 2012 50–21 70.4% #10 1,975 0 20 2003 36–3 92.3% #3 2,365 6 23
22 2013 41–22 65.1% #10 1,906 0 21 2004 39–11 78.0% #7 2,225 6 25
23 2014 49–19 72.1% #8 2,014 0 22 2005 21–9 70.0% #11 2,101 7 26
24 2015 39–23 62.9% #17 1,817 0 23 2006 12–4 75.0% #95 2,063 7 26
25 2016 34–18 65.4% #19 1,912 0 25 2007 34–10 77.3% #7 2,077 8 28
26 2017 60–22 73.2% #3 2,004 0 27 2008 44–9 83.0% #2 2,126 9 32
27 2018 41–17 70.7% #3 1,947 1 30 2009 50–13 79.4% #1 2,120 11 35
28 2019 20–15 57.1% #38 1,845 1 30 2010 25–4 86.2% #4 2,158 13 37
29 2020 5–2 71.4% #36 1,852 1 30 2011 22–4 84.6% #12 2,182 13 39
30 2012 54–6 90.0% #3 2,302 15 46
31 2013 77–5 93.9% #1 2,382 17 57
32 2023 4–3 57.1% #249 1,862 1 30 2014 52–10 83.9% #1 2,272 18 64
33 2024 16–13 55.2% #70 1,845 1 30 2015 50–6 89.3% #1 2,292 21 69
34 2016 38–6 86.4% #2 2,208 22 71
35 2017 8–1 88.9% #22 2,200 23 72
36 2018 18–7 72.0% #16 2,112 23 72
37 2019 25–8 75.8% #10 2,093 23 72
38 2020 16–5 76.2% #11 2,045 23 73
39 2021 12–6 66.7% #41 1,994 23 73
40 2022 3–4 42.9% #320 1,926 23 73
44 2026 0–1 0.0% #320 1,899 23 73

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 Caroline Wozniacki Serena Williams
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 %
14 2005 0 2 2 0.0%
15 2006 4 4 8 50.0% 1997 3 2 5 60.0%
16 2007 8 10 18 44.4% 3 4 7 42.9% 1 1 2 50.0% 1998 16 7 23 69.6% 6 2 8 75.0% 4 2 6 66.7%
17 2008 42 13 55 76.4% 7 5 12 58.3% 4 2 6 66.7% 1999 27 4 31 87.1% 6 3 9 66.7% 5 0 5 100.0%
18 2009 35 18 53 66.0% 23 6 29 79.3% 8 1 9 88.9% 2000 29 5 34 85.3% 0 1 1 0.0% 5 1 6 83.3% 3 1 4 75.0%
19 2010 45 9 54 83.3% 15 6 21 71.4% 3 2 5 60.0% 2001 32 5 37 86.5% 4 1 5 80.0% 4 1 5 80.0%
20 2011 40 11 51 78.4% 20 5 25 80.0% 3 1 4 75.0% 2002 28 3 31 90.3% 18 2 20 90.0% 7 0 7 100.0% 4 0 4 100.0%
21 2012 42 14 56 75.0% 5 4 9 55.6% 3 3 6 50.0% 2003 13 0 13 100.0% 12 3 15 80.0% 7 0 7 100.0% 4 0 4 100.0%
22 2013 34 14 48 70.8% 3 6 9 33.3% 4 2 6 66.7% 2004 23 6 29 79.3% 10 4 14 71.4% 6 1 7 85.7%
23 2014 42 15 57 73.7% 1 2 3 33.3% 6 2 8 75.0% 2005 16 5 21 76.2% 2 2 4 50.0% 2 1 3 66.7% 1 1 2 50.0%
24 2015 26 17 43 60.5% 7 4 11 63.6% 6 2 8 75.0% 2006 12 4 16 75.0%
25 2016 31 14 45 68.9% 3 4 7 42.9% 2007 24 6 30 80.0% 6 3 9 66.7% 4 1 5 80.0%
26 2017 41 14 55 74.5% 12 6 18 66.7% 7 2 9 77.8% 2008 27 5 32 84.4% 11 3 14 78.6% 6 1 7 85.7%
27 2018 26 12 38 68.4% 9 4 13 69.2% 6 1 7 85.7% 2009 36 8 44 81.8% 4 4 8 50.0% 7 0 7 100.0% 3 1 4 75.0%
28 2019 12 9 21 57.1% 4 4 8 50.0% 4 2 6 66.7% 2010 10 1 11 90.9% 8 3 11 72.7% 7 0 7 100.0%
29 2020 5 2 7 71.4% 2011 18 2 20 90.0% 4 2 6 66.7%
30 2012 26 4 30 86.7% 15 2 17 88.2% 13 0 13 100.0%
31 2013 46 4 50 92.0% 28 0 28 100.0% 3 1 4 75.0%
32 2023 4 3 7 57.1% 2014 41 6 47 87.2% 9 3 12 75.0% 2 1 3 66.7%
33 2024 10 7 17 58.8% 2 3 5 40.0% 4 3 7 57.1% 2015 30 3 33 90.9% 13 3 16 81.3% 7 0 7 100.0%
34 2016 20 5 25 80.0% 11 1 12 91.7% 7 0 7 100.0%
35 2017 8 1 9 88.9%
36 2018 9 5 14 64.3% 3 1 4 75.0% 6 1 7 85.7%
37 2019 16 5 21 76.2% 3 2 5 60.0% 6 1 7 85.7%
38 2020 15 4 19 78.9% 1 1 2 50.0%
39 2021 8 2 10 80.0% 4 3 7 57.1% 0 1 1 0.0%
40 2022 3 3 6 50.0% 0 1 1 0.0%
44 2026 0 1 1 0.0%
Career 447 188 635 70.4% 111 59 170 65.3% 62 28 90 68.9% 533 103 636 83.8% 174 47 221 78.7% 107 17 124 86.3% 23 5 28 82.1%

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 788/893 of Caroline Wozniacki's and 633/768 of Serena Williams'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 Caroline Wozniacki Serena Williams
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 2006 3/8 2.7 2.3 65.7% 58.9% 51.0% 43.9% 42.3% 56.6% 49.3% —/—
16 2007 18/27 1.1 3.2 67.3% 56.6% 40.0% 54.4% 45.4% 51.4% 41.8% —/—
17 2008 63/73 2.1 2.1 65.9% 65.6% 50.8% 58.8% 54.4% 60.4% 49.1% —/—
18 2009 86/91 2.0 1.7 68.9% 64.2% 50.0% 52.2% 49.6% 59.7% 48.6% —/—
19 2010 71/80 1.8 1.9 68.9% 65.3% 50.2% 59.5% 50.1% 60.6% 48.1% —/—
20 2011 73/80 1.6 1.6 70.6% 65.6% 51.4% 58.1% 53.0% 61.5% 51.1% —/—
21 2012 60/71 1.8 1.6 66.8% 63.6% 51.4% 59.5% 52.9% 59.4% 47.5% 2003 13/39 3.9 2.1 61.7% 74.0% 52.8% 63.9% 58.8% 66.1% 51.8%
22 2013 56/63 1.5 1.8 69.1% 62.5% 50.3% 59.3% 54.1% 58.9% 47.5% 2004 16/50 6.4 2.6 61.3% 73.3% 51.5% 64.8% 54.6% 64.9% 49.7%
23 2014 61/68 2.3 2.6 69.6% 66.0% 48.0% 58.7% 53.3% 60.4% 48.1% 2005 14/30 5.9 2.6 61.2% 74.1% 52.5% 68.0% 48.3% 65.1% 47.5%
24 2015 51/62 2.0 1.9 69.9% 65.3% 52.6% 50.4% 51.3% 61.5% 46.7% 2006 15/16 6.3 2.9 59.3% 74.2% 47.4% 54.7% 58.2% 63.1% 46.9%
25 2016 44/52 2.1 2.1 67.7% 66.5% 46.3% 57.0% 56.3% 59.9% 47.8% 2007 42/44 6.1 2.6 59.4% 69.2% 48.1% 58.2% 57.3% 60.8% 46.0%
26 2017 76/82 2.6 2.2 67.6% 65.7% 49.4% 56.8% 51.6% 60.2% 47.8% 2008 44/53 6.8 2.7 61.4% 73.4% 45.2% 60.0% 47.6% 62.7% 47.7%
27 2018 50/58 3.0 2.5 64.9% 68.0% 48.4% 52.5% 54.9% 61.2% 48.3% 2009 57/63 6.2 2.8 60.8% 75.0% 50.7% 54.5% 48.2% 65.3% 46.2%
28 2019 35/35 2.8 1.8 65.3% 63.2% 50.1% 51.6% 50.7% 58.5% 44.4% 2010 29/29 8.6 2.9 62.3% 77.4% 47.5% 66.0% 51.5% 66.4% 46.8%
29 2020 7/7 3.1 1.3 70.4% 68.7% 54.5% 63.1% 43.8% 64.8% 49.2% 2011 25/26 8.0 2.5 59.0% 79.5% 53.0% 67.2% 50.8% 68.7% 46.9%
30 —/— 2012 48/60 8.2 2.3 59.0% 78.7% 54.8% 66.6% 53.2% 68.8% 49.8%
31 —/— 2013 74/82 6.1 2.2 63.0% 76.5% 53.5% 60.3% 56.0% 68.1% 52.4%
32 2023 7/7 2.1 3.0 61.5% 67.5% 47.4% 57.7% 36.6% 59.6% 44.8% 2014 56/62 7.7 3.5 59.3% 76.5% 51.6% 64.4% 52.8% 66.3% 48.9%
33 2024 27/29 1.8 2.6 64.3% 65.3% 47.6% 55.5% 55.0% 59.1% 46.8% 2015 50/56 9.5 3.5 59.9% 76.7% 55.9% 67.3% 54.5% 68.4% 47.8%
34 —/— 2016 41/44 7.9 2.8 62.3% 77.4% 51.9% 58.8% 50.6% 68.0% 49.0%
35 —/— 2017 9/9 7.9 3.9 55.9% 79.6% 46.7% 57.9% 51.3% 65.7% 46.5%
36 —/— 2018 24/25 7.1 3.4 59.2% 74.2% 48.5% 55.3% 51.9% 63.9% 44.0%
37 —/— 2019 31/33 6.6 2.8 59.2% 76.5% 50.4% 50.4% 45.6% 65.5% 46.7%
38 —/— 2020 20/21 8.9 2.7 61.3% 73.3% 50.7% 71.0% 49.7% 64.3% 44.9%
39 —/— 2021 17/18 5.1 2.6 57.4% 72.6% 48.9% 43.6% 49.4% 62.4% 46.2%
40 —/— 2022 7/7 8.0 4.7 65.0% 68.0% 35.4% 62.0% 45.8% 56.6% 40.5%
44 —/— 2026 1/1 7.0 7.0 79.0% 62.7% 45.0% 54.6% 27.3% 59.0% 38.2%
Career 788/895 2.1 2.0 67.9% 65.0% 49.7% 56.4% 52.2% 60.0% 47.9% 633/1,009 7.2 2.8 60.6% 75.5% 50.9% 60.9% 52.1% 65.8% 48.0%

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 Caroline Wozniacki Serena Williams
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
14 2005 1482 101.4 0.0% -3.75 0–1 -0.25
15 2006 1527 119.1 +0.53 +0.91 1.137 52.5% +17 47.1% -0.12 1–0 -0.46 1997 1582 144.0 +42 54.5% +0.82 1–0 1–1 -0.18
16 2007 1556 117.2 -2.81 -1.82 0.860 46.7% +15 -35 46.0% -0.59 4–5 (44%) 7–1 (88%) 103.2 +0.40 1998 1893 158.1 -62 -201 -189 64.6% +1.29 8–5 (62%) 2–3 (40%) 106.2 -1.19
17 2008 1914 154.8 +4.79 +4.70 1.241 54.7% -5 -303 -228 69.9% +1.69 9–5 (64%) 6–8 (43%) 104.7 -0.96 1999 2189 178.2 +12 -418 80.2% +2.10 8–5 (62%) 6–0 (100%) 108.5 -2.69
18 2009 1899 153.9 +3.97 +4.82 1.208 54.1% -27 -24 -64 69.4% +1.47 15–8 (65%) 11–7 (61%) 106.6 -0.77 2000 2185 168.9 +24 -372 80.6% +2.43 6–1 (86%) 4–3 (57%) 102.2 +0.57
19 2010 2105 166.0 +4.94 +4.76 1.219 54.3% +27 -204 -284 72.4% +1.70 18–4 (82%) 8–2 (80%) 113.4 +1.46 2001 2238 172.8 +36 -434 -326 79.2% +2.45 7–4 (64%) 5–5 (50%) 100.5 -2.79
20 2011 1988 162.1 +5.76 +7.01 1.328 56.0% +52 -9 -153 74.7% +1.90 11–7 (61%) 10–5 (67%) 101.2 +1.97 2002 2339 173.4 +18 -278 -232 87.1% +2.70 9–3 (75%) 11–1 (92%) 111.5 -2.86
21 2012 1976 156.2 +3.80 +4.12 1.171 53.6% +42 -42 -144 66.9% +1.29 15–9 (63%) 11–8 (58%) 100.8 +0.75 2003 2365 170.4 +7.11 +5.95 1.527 58.7% +80 -218 -130 86.0% +2.74 6–2 (75%) 2–0 -1.67
22 2013 1906 152.3 +3.39 +3.53 1.156 53.3% +82 -137 -61 61.0% +1.06 9–9 (50%) 6–9 (40%) 92.0 +3.21 2004 2226 163.6 +6.68 +4.43 1.416 56.9% +107 -101 +86 74.8% +1.90 9–4 (69%) 4–3 (57%) 96.9 -0.38
23 2014 2014 163.0 +4.24 +5.25 1.216 54.2% +24 -280 -133 64.9% +1.45 16–6 (73%) 5–10 (33%) 100.3 -0.30 2005 2101 150.6 +5.70 +2.41 1.360 56.0% +157 -3 +122 70.0% +1.48 8–0 (100%) 1–6 (14%) 99.2 -0.26
24 2015 1818 153.2 +3.21 +4.72 1.211 54.0% +6 -9 +74 62.6% +1.23 9–6 (60%) 8–7 (53%) 101.2 -0.90 2006 2064 147.1 +4.12 +2.38 1.272 54.9% +120 69.4% +1.75 3–1 (75%) 0–3 (0%) 96.2 -0.43
25 2016 1912 146.8 +3.41 +3.91 1.191 53.8% +27 -117 65.2% +1.25 8–7 (53%) 3–5 (38%) 96.7 -0.32 2007 2077 165.4 +4.80 +3.80 1.173 53.4% +88 +12 +155 78.3% +1.84 6–4 (60%) 9–3 (75%) 101.7 -2.31
26 2017 2004 161.0 +3.91 +4.92 1.202 54.0% +52 -146 -103 68.5% +1.56 17–8 (68%) 5–6 (45%) 103.2 +0.13 2008 2126 164.9 +6.89 +4.29 1.280 55.0% +42 -33 +130 80.0% +2.11 9–4 (69%) 5–2 (71%) 102.9 -1.00
27 2018 1947 156.8 +4.39 +5.24 1.245 54.7% +6 -64 +24 67.7% +1.47 12–6 (67%) 6–7 (46%) 101.2 +0.11 2009 2120 165.8 +9.20 +3.92 1.332 55.3% +59 -117 +157 75.6% +1.76 11–6 (65%) 8–8 (50%) 98.1 -2.33
28 2019 1845 144.8 +1.89 +0.99 1.069 51.3% +47 -6 +118 60.8% +0.70 3–7 (30%) 5–2 (71%) 96.0 +0.87 2010 2159 157.0 +8.78 +3.86 1.393 56.1% +37 -163 +212 79.1% +2.01 6–3 (67%) 10–2 (83%) 106.5 -1.14
29 2020 1853 131.5 +2.36 +2.51 1.397 56.9% +35 70.6% +1.71 1–2 (33%) +0.18 2011 2182 160.3 +9.93 +4.56 1.499 57.5% +57 +125 78.9% +2.33 6–1 (86%) 3–2 (60%) 101.2 -0.27
30 2012 2302 168.5 +11.57 +6.33 1.597 58.7% -26 -157 +62 88.2% +2.98 6–1 (86%) 3–2 (60%) 103.3 -2.18
31 2013 2383 177.8 +12.05 +8.21 1.643 59.9% -2 -40 +41 89.7% +3.22 10–4 (71%) 3–3 (50%) 101.0 -0.69
32 2023 1863 134.9 +2.02 +2.05 1.110 51.8% +58 56.3% +0.56 1–1 1–0 -0.17 2014 2273 171.7 +9.98 +6.05 1.454 57.3% +55 +1 +33 83.6% +2.37 7–3 (70%) 8–0 (100%) 102.4 -0.53
33 2024 1845 140.8 +1.93 +2.73 1.145 53.0% +44 -42 +224 58.1% +0.77 4–6 (40%) 2–1 (67%) 96.6 +0.15 2015 2293 165.1 +9.57 +5.97 1.514 57.9% +37 -12 +16 81.3% +2.24 17–2 (89%) 7–2 (78%) 105.8 -0.61
34 2016 2208 161.7 +10.55 +5.23 1.529 57.9% +31 +121 +136 83.0% +2.39 4–2 (67%) 8–2 (80%) 100.3 -0.68
35 2017 2201 137.8 +4.47 +1.79 1.354 56.0% +39 89.5% +2.32 0–1 1–0 -0.09
36 2018 2112 148.0 +5.23 +2.07 1.220 53.7% +22 +268 +229 71.2% +1.29 3–1 (75%) 3–0 (100%) 102.0 -0.74
37 2019 2094 156.8 +7.34 +3.63 1.352 55.6% +42 +282 +271 77.3% +2.05 7–1 (88%) -0.12
38 2020 2046 143.2 +4.70 +1.29 1.259 54.8% +19 70.6% +1.55 7–4 (64%) 4–3 (57%) 97.0 +0.57
39 2021 1994 145.6 +4.15 +2.90 1.229 53.9% +132 +333 68.6% +1.54 3–0 (100%) 2–2 (50%) 101.9 -0.19
40 2022 1926 119.5 +0.06 -0.90 0.934 48.7% +144 47.1% -0.35 1–2 (33%) 2–1 (67%) +0.04
44 2026 1899 96.8 +0.09 -3.44 0.931 47.3% 33.3% -1.67 0–1 1–0 +0.12
Career 2154 160.9 +3.83 +4.42 1.199 53.9% +28 -90 -57 66.3% +1.33 153–96 (61%) 94–79 (54%) 104.3 +0.57 2399 174.5 +8.45 +4.77 1.403 56.6% +43 -85 +34 79.6% +2.21 168–65 (72%) 113–57 (66%) 110.8 -2.44

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.