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

Ai Sugiyama vs Kimberly Po Messerli H2H: 2-3

Kimberly Po Messerli holds a 3–2 lead over Ai Sugiyama in their WTA head-to-head. Across 5 main-draw meetings, Kimberly Po Messerli leads 3–1 on hard courts, while Ai Sugiyama leads 1–0 on grass. Most recently, Kimberly Po Messerli won the 1997 Stanford round of 16 6-3 6-1.

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Ai Sugiyama
JPN Age 51 Right-Handed 163 cm / 5'4"
H2H
2 – 3
5 main-draw meetings
Kimberly Po Messerli
USA Age 54 Right-Handed 160 cm / 5'3"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Kimberly Po Messerli 6-3 6-1 Ai Sugiyama #34 Match data Jul 25, 1997* R16 Stanford Tier II → modern equivalent WTA 500 Hard
Ai Sugiyama #27 6-3 6-1 Kimberly Po Messerli Match data Jun 21, 1997* R16 Eastbourne Open WTA 250 Grass
Ai Sugiyama #30 5-7 6-4 6-1 Kimberly Po Messerli Match data Apr 19, 1997* SF Japan Women's Open Tier III → modern equivalent WTA 250 Hard
Kimberly Po Messerli 6-0 4-6 6-3 Ai Sugiyama #29 Match data Jan 17, 1997* R64 Australian Open Grand Slam Hard
Kimberly Po Messerli 6-2 6-7 6-4 Ai Sugiyama #23 Match data Sep 20, 1996* R16 Toyota Princess Cup Tier II → 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 1000 including documented historical predecessor categories Finals 500 including documented historical predecessor categories 250 including documented historical predecessor categories Titles
Ai Sugiyama #97 #8 2,400 1,951 416 366 53.2% 0 0 0 2 4 6
Kimberly Po Messerli — — — 1,879 118 133 47.0% 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 Ai Sugiyama Kimberly Po Messerli
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 1992 1–4 20.0% #184 1,477 0 0 — — — — — — —
17 1993 3–8 27.3% #145 1,486 0 0 1989 0–1 0.0% — 1,486 0 0
18 1994 9–11 45.0% #72 1,556 0 0 — — — — — — —
19 1995 16–17 48.5% #46 1,665 0 0 1991 5–4 55.6% — 1,568 0 0
20 1996 24–19 55.8% #28 1,751 0 0 1992 14–16 46.7% — 1,654 0 0
21 1997 31–25 55.4% #21 1,837 0 1 1993 20–19 51.3% — 1,776 0 0
22 1998 37–21 63.8% #18 1,862 0 3 1994 11–17 39.3% — 1,701 0 0
23 1999 27–23 54.0% #24 1,807 0 3 1995 4–13 23.5% — 1,609 0 0
24 2000 20–25 44.4% #32 1,679 0 3 1996 20–13 60.6% — 1,806 0 0
25 2001 28–25 52.8% #30 1,718 0 3 1997 27–20 57.4% — 1,790 0 0
26 2002 35–26 57.4% #24 1,755 0 3 1998 11–15 42.3% — 1,743 0 0
27 2003 44–25 63.8% #10 1,915 0 5 1999 6–13 31.6% — 1,653 0 0
28 2004 33–23 58.9% #17 1,808 0 6 2000 0–2 0.0% — 1,611 0 0
29 2005 28–27 50.9% #29 1,741 0 6 — — — — — — —
30 2006 28–25 52.8% #26 1,743 0 6 — — — — — — —
31 2007 17–21 44.7% #38 1,633 0 6 — — — — — — —
32 2008 26–22 54.2% #31 1,713 0 6 — — — — — — —
33 2009 9–19 32.1% #97 1,627 0 6 — — — — — — —

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 Ai Sugiyama 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 %
16 1992 0 3 3 0.0% — — — — — — — — 1 1 2 50.0% — — — — — — — — — — — — — — — — —
17 1993 2 3 5 40.0% — — — — 0 2 2 0.0% 1 3 4 25.0% 1989 0 1 1 0.0% — — — — — — — — — — — —
18 1994 6 7 13 46.2% — — — — 0 2 2 0.0% 3 2 5 60.0% — — — — — — — — — — — — — — — — —
19 1995 5 8 13 38.5% 6 4 10 60.0% 0 2 2 0.0% 5 3 8 62.5% 1991 5 4 9 55.6% — — — — — — — — — — — —
20 1996 19 11 30 63.3% 0 3 3 0.0% 4 2 6 66.7% 1 3 4 25.0% 1992 9 10 19 47.4% 0 1 1 0.0% 4 3 7 57.1% 1 2 3 33.3%
21 1997 19 13 32 59.4% 3 5 8 37.5% 2 2 4 50.0% 7 5 12 58.3% 1993 10 9 19 52.6% 2 2 4 50.0% 2 3 5 40.0% 6 5 11 54.5%
22 1998 24 9 33 72.7% 6 5 11 54.5% 1 2 3 33.3% 6 5 11 54.5% 1994 3 6 9 33.3% 2 4 6 33.3% 1 2 3 33.3% 5 5 10 50.0%
23 1999 18 11 29 62.1% 3 4 7 42.9% 2 2 4 50.0% 4 6 10 40.0% 1995 3 4 7 42.9% 0 5 5 0.0% 0 2 2 0.0% 1 2 3 33.3%
24 2000 11 13 24 45.8% 6 5 11 54.5% 1 2 3 33.3% 2 5 7 28.6% 1996 13 6 19 68.4% — — — — 1 2 3 33.3% 6 5 11 54.5%
25 2001 20 14 34 58.8% 4 6 10 40.0% 2 3 5 40.0% 2 2 4 50.0% 1997 21 13 34 61.8% 2 2 4 50.0% 1 2 3 33.3% 3 3 6 50.0%
26 2002 26 16 42 61.9% 4 6 10 40.0% 5 3 8 62.5% 0 1 1 0.0% 1998 5 8 13 38.5% 1 3 4 25.0% 4 2 6 66.7% 1 2 3 33.3%
27 2003 29 16 45 64.4% 7 4 11 63.6% 4 2 6 66.7% 4 3 7 57.1% 1999 3 6 9 33.3% 1 3 4 25.0% 2 2 4 50.0% 0 2 2 0.0%
28 2004 22 14 36 61.1% 5 5 10 50.0% 5 2 7 71.4% 1 2 3 33.3% 2000 — — — — — — — — 0 1 1 0.0% 0 1 1 0.0%
29 2005 20 17 37 54.1% 7 6 13 53.8% 1 3 4 25.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
30 2006 22 18 40 55.0% 1 3 4 25.0% 5 3 8 62.5% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
31 2007 10 15 25 40.0% 3 2 5 60.0% 2 3 5 40.0% 2 1 3 66.7% — — — — — — — — — — — — — — — — —
32 2008 20 15 35 57.1% 4 5 9 44.4% 2 2 4 50.0% — — — — — — — — — — — — — — — — — — — — —
33 2009 7 13 20 35.0% 0 4 4 0.0% 2 2 4 50.0% — — — — — — — — — — — — — — — — — — — — —
Career — 280 216 496 56.5% 59 67 126 46.8% 38 39 77 49.4% 39 44 83 47.0% — 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 Ai Sugiyama 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
16 1992 1478 102.6 — — — — +34 — — 30.8% -1.31 1–2 (33%) 0–2 — +0.31 — — — — — — — — — — — — — — — —
17 1993 1487 125.5 — — — — +44 — — 37.0% -0.89 1–4 (20%) — — -0.26 1989 1486 97.5 — — — — — — — 0.0% -2.50 — 0–1 — +0.12
18 1994 1557 120.7 — — — — +41 — — 47.8% +0.13 4–4 (50%) 1–2 (33%) — +1.49 — — — — — — — — — — — — — — — —
19 1995 1665 135.9 — — — — -9 -11 — 49.3% +0.23 4–7 (36%) 3–0 (100%) 101.9 +0.28 1991 1568 120.4 — — — — +29 — — 56.5% -0.26 2–3 (40%) 1–0 — -0.01
20 1996 1751 143.7 — — — — -8 -156 -152 54.3% +0.29 5–5 (50%) 3–3 (50%) 99.1 +0.30 1992 1655 127.7 — — — — -8 — -30 45.6% -0.40 5–5 (50%) 4–2 (67%) 103.5 +0.99
21 1997 1837 150.1 — — — — +27 -234 -204 51.5% 0.00 14–8 (64%) 11–8 (58%) 106.9 -1.35 1993 1777 145.0 — — — — +17 -217 -153 50.0% -0.15 6–4 (60%) 5–2 (71%) 106.5 -0.91
22 1998 1862 153.1 — — — — +57 -206 -239 60.3% +0.68 12–5 (71%) 9–4 (69%) 107.7 +0.41 1994 1702 128.7 — — — — +38 -143 -106 44.6% -0.51 4–7 (36%) 2–2 (50%) — -0.08
23 1999 1808 151.0 — — — — +46 -168 -203 53.0% +0.21 8–7 (53%) 4–4 (50%) 99.6 -1.12 1995 1610 120.0 — — — — +98 -130 — 29.7% -1.11 0–3 (0%) 1–3 (25%) 93.6 +0.25
24 2000 1679 137.5 — — — — +24 +5 -92 46.1% -0.54 5–7 (42%) 7–5 (58%) 99.7 -0.80 1996 1807 155.2 — — — — +52 — -239 57.5% +0.44 5–4 (56%) 1–1 — +0.41
25 2001 1719 138.7 — — — — +19 -57 -121 53.7% +0.17 10–11 (48%) 6–2 (75%) 102.9 -0.48 1997 1790 146.8 — — — — +28 -289 -240 55.0% +0.44 9–8 (53%) 7–2 (78%) 103.7 +1.04
26 2002 1755 141.6 — — — — +15 -109 -67 56.1% +0.32 9–8 (53%) 8–6 (57%) 100.6 -0.40 1998 1743 135.6 — — — — +16 -267 -100 44.8% -0.59 2–4 (33%) 4–1 (80%) 102.7 -0.85
27 2003 1915 154.1 +1.48 +3.41 1.113 52.2% -8 -157 -164 58.3% +0.63 22–10 (69%) 7–7 (50%) 105.4 +1.81 1999 1653 120.4 — — — — +21 -179 -26 38.1% -1.00 0–4 (0%) 1–4 (20%) 93.6 -1.39
28 2004 1808 144.1 +0.61 +2.40 1.121 52.5% -4 -67 +28 57.5% +0.58 8–7 (53%) 4–8 (33%) 97.4 +2.38 2000 1611 101.2 — — — — — — — 20.0% -1.00 0–1 0–2 — +0.12
29 2005 1742 133.4 -1.10 -0.52 0.908 47.7% +17 -41 -12 51.1% +0.11 11–16 (41%) 6–4 (60%) 94.4 +2.95 — — — — — — — — — — — — — — — —
30 2006 1744 138.5 -0.78 +0.79 0.988 49.8% +9 -91 +46 50.8% +0.14 10–8 (56%) 2–14 (13%) 94.4 +0.98 — — — — — — — — — — — — — — — —
31 2007 1633 125.5 -2.23 +2.56 0.996 50.0% -7 +43 +130 47.3% -0.13 8–9 (47%) 5–4 (56%) 98.7 +1.74 — — — — — — — — — — — — — — — —
32 2008 1713 136.4 -0.29 +1.82 0.995 49.6% +26 -71 +32 48.5% -0.19 8–5 (62%) 5–5 (50%) 105.2 +0.32 — — — — — — — — — — — — — — — —
33 2009 1627 135.9 -1.68 -1.34 0.871 46.9% +43 -37 +108 35.6% -0.86 2–5 (29%) 4–3 (57%) 100.4 -0.98 — — — — — — — — — — — — — — — —
Career — 1952 148.1 -0.87 +1.32 0.986 49.6% +18 -90 -55 52.1% +0.15 142–128 (53%) 85–81 (51%) 103.0 +0.97 — 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.