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

Serena Williams vs Kimberly Po Messerli H2H: 1-1

Serena Williams and Kimberly Po Messerli are tied 1–1 in their WTA head-to-head. Across 2 main-draw meetings, Kimberly Po Messerli leads 1–0 on carpet, while Serena Williams leads 1–0 on hard courts. Most recently, Serena Williams won the 1999 US Open round of 128 6-1 6-0.

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Serena Williams
USA Age 44 Right-Handed 175 cm / 5'9"
H2H
1 – 1
2 main-draw meetings
Kimberly Po Messerli
USA Age 54 Right-Handed 160 cm / 5'3"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Serena Williams #6 6-1 6-0 Kimberly Po Messerli Match data Sep 1, 1999* R128 US Open Grand Slam Hard
Kimberly Po Messerli 6-3 7-6 Serena Williams #448 Match data Oct 30, 1997* R32 Kremlin Cup Tier I → modern equivalent WTA 1000 Carpet

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
Serena Williams #320 #1 13,615 2,399 837 172 83.0% 23 1 23 6 18 2 73
Kimberly Po Messerli — — — 1,879 118 133 47.0% 0 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 Serena Williams Kimberly Po Messerli
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
15 1997 3–2 60.0% #101 1,582 0 0 — — — — — — —
16 1998 26–11 70.3% #20 1,893 0 0 — — — — — — —
17 1999 38–7 84.4% #4 2,189 1 5 1989 0–1 0.0% — 1,486 0 0
18 2000 37–8 82.2% #6 2,184 1 8 — — — — — — —
19 2001 40–7 85.1% #6 2,237 1 11 1991 5–4 55.6% — 1,568 0 0
20 2002 57–5 91.9% #1 2,339 4 19 1992 14–16 46.7% — 1,654 0 0
21 2003 36–3 92.3% #3 2,365 6 23 1993 20–19 51.3% — 1,776 0 0
22 2004 39–11 78.0% #7 2,225 6 25 1994 11–17 39.3% — 1,701 0 0
23 2005 21–9 70.0% #11 2,101 7 26 1995 4–13 23.5% — 1,609 0 0
24 2006 12–4 75.0% #95 2,063 7 26 1996 20–13 60.6% — 1,806 0 0
25 2007 34–10 77.3% #7 2,077 8 28 1997 27–20 57.4% — 1,790 0 0
26 2008 44–9 83.0% #2 2,126 9 32 1998 11–15 42.3% — 1,743 0 0
27 2009 50–13 79.4% #1 2,120 11 35 1999 6–13 31.6% — 1,653 0 0
28 2010 25–4 86.2% #4 2,158 13 37 2000 0–2 0.0% — 1,611 0 0
29 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 2014 52–10 83.9% #1 2,272 18 64 — — — — — — —
33 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 Serena Williams Kimberly Po Messerli
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 1997 — — — — — — — — — — — — 3 2 5 60.0% — — — — — — — — — — — — — — — — —
16 1998 16 7 23 69.6% 6 2 8 75.0% 4 2 6 66.7% — — — — — — — — — — — — — — — — — — — — —
17 1999 27 4 31 87.1% 6 3 9 66.7% — — — — 5 0 5 100.0% 1989 0 1 1 0.0% — — — — — — — — — — — —
18 2000 29 5 34 85.3% 0 1 1 0.0% 5 1 6 83.3% 3 1 4 75.0% — — — — — — — — — — — — — — — — —
19 2001 32 5 37 86.5% 4 1 5 80.0% 4 1 5 80.0% — — — — 1991 5 4 9 55.6% — — — — — — — — — — — —
20 2002 28 3 31 90.3% 18 2 20 90.0% 7 0 7 100.0% 4 0 4 100.0% 1992 9 10 19 47.4% 0 1 1 0.0% 4 3 7 57.1% 1 2 3 33.3%
21 2003 13 0 13 100.0% 12 3 15 80.0% 7 0 7 100.0% 4 0 4 100.0% 1993 10 9 19 52.6% 2 2 4 50.0% 2 3 5 40.0% 6 5 11 54.5%
22 2004 23 6 29 79.3% 10 4 14 71.4% 6 1 7 85.7% — — — — 1994 3 6 9 33.3% 2 4 6 33.3% 1 2 3 33.3% 5 5 10 50.0%
23 2005 16 5 21 76.2% 2 2 4 50.0% 2 1 3 66.7% 1 1 2 50.0% 1995 3 4 7 42.9% 0 5 5 0.0% 0 2 2 0.0% 1 2 3 33.3%
24 2006 12 4 16 75.0% — — — — — — — — — — — — 1996 13 6 19 68.4% — — — — 1 2 3 33.3% 6 5 11 54.5%
25 2007 24 6 30 80.0% 6 3 9 66.7% 4 1 5 80.0% — — — — 1997 21 13 34 61.8% 2 2 4 50.0% 1 2 3 33.3% 3 3 6 50.0%
26 2008 27 5 32 84.4% 11 3 14 78.6% 6 1 7 85.7% — — — — 1998 5 8 13 38.5% 1 3 4 25.0% 4 2 6 66.7% 1 2 3 33.3%
27 2009 36 8 44 81.8% 4 4 8 50.0% 7 0 7 100.0% 3 1 4 75.0% 1999 3 6 9 33.3% 1 3 4 25.0% 2 2 4 50.0% 0 2 2 0.0%
28 2010 10 1 11 90.9% 8 3 11 72.7% 7 0 7 100.0% — — — — 2000 — — — — — — — — 0 1 1 0.0% 0 1 1 0.0%
29 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 2014 41 6 47 87.2% 9 3 12 75.0% 2 1 3 66.7% — — — — — — — — — — — — — — — — — — — — —
33 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 — 533 103 636 83.8% 174 47 221 78.7% 107 17 124 86.3% 23 5 28 82.1% — 72 67 139 51.8% 8 20 28 28.6% 15 19 34 44.1% 23 27 50 46.0%

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 Serena Williams Kimberly Po Messerli
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 1997 1582 144.0 — — — — +42 — — 54.5% +0.82 1–0 1–1 — -0.18 — — — — — — — — — — — — — — — —
16 1998 1893 158.1 — — — — -62 -201 -189 64.6% +1.29 8–5 (62%) 2–3 (40%) 106.2 -1.19 — — — — — — — — — — — — — — — —
17 1999 2189 178.2 — — — — +12 -418 — 80.2% +2.10 8–5 (62%) 6–0 (100%) 108.5 -2.69 1989 1486 97.5 — — — — — — — 0.0% -2.50 — 0–1 — +0.12
18 2000 2185 168.9 — — — — +24 — -372 80.6% +2.43 6–1 (86%) 4–3 (57%) 102.2 +0.57 — — — — — — — — — — — — — — — —
19 2001 2238 172.8 — — — — +36 -434 -326 79.2% +2.45 7–4 (64%) 5–5 (50%) 100.5 -2.79 1991 1568 120.4 — — — — +29 — — 56.5% -0.26 2–3 (40%) 1–0 — -0.01
20 2002 2339 173.4 — — — — +18 -278 -232 87.1% +2.70 9–3 (75%) 11–1 (92%) 111.5 -2.86 1992 1655 127.7 — — — — -8 — -30 45.6% -0.40 5–5 (50%) 4–2 (67%) 103.5 +0.99
21 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 1993 1777 145.0 — — — — +17 -217 -153 50.0% -0.15 6–4 (60%) 5–2 (71%) 106.5 -0.91
22 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 1994 1702 128.7 — — — — +38 -143 -106 44.6% -0.51 4–7 (36%) 2–2 (50%) — -0.08
23 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 1995 1610 120.0 — — — — +98 -130 — 29.7% -1.11 0–3 (0%) 1–3 (25%) 93.6 +0.25
24 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 1996 1807 155.2 — — — — +52 — -239 57.5% +0.44 5–4 (56%) 1–1 — +0.41
25 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 1997 1790 146.8 — — — — +28 -289 -240 55.0% +0.44 9–8 (53%) 7–2 (78%) 103.7 +1.04
26 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 1998 1743 135.6 — — — — +16 -267 -100 44.8% -0.59 2–4 (33%) 4–1 (80%) 102.7 -0.85
27 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 1999 1653 120.4 — — — — +21 -179 -26 38.1% -1.00 0–4 (0%) 1–4 (20%) 93.6 -1.39
28 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 2000 1611 101.2 — — — — — — — 20.0% -1.00 0–1 0–2 — +0.12
29 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 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 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 — 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 — 1880 144.9 — — — — +29 -197 -111 47.9% -0.22 33–43 (43%) 26–20 (57%) 102.5 -0.12

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.