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

Kimberly Po Messerli vs Mareen Louie Harper H2H: 1-0

Kimberly Po Messerli holds a 1–0 lead over Mareen Louie Harper in their WTA head-to-head. Across 1 main-draw meeting, Kimberly Po Messerli leads 1–0 on hard courts. Most recently, Kimberly Po Messerli won the 1991 San Diego round of 32 6-3 6-3.

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Kimberly Po Messerli
USA Age 54 Right-Handed 160 cm / 5'3"
H2H
1 – 0
1 main-draw meetings
Mareen Louie Harper
USA Age 66

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Kimberly Po Messerli 6-3 6-3 Mareen Louie Harper Match data Aug 1, 1991* R32 San Diego Tier III → modern equivalent WTA 250 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
Kimberly Po Messerli — — — 1,879 118 133 47.0% 0 0 0 0 0 0
Mareen Louie Harper — — — 1,910 177 239 42.5% 0 0 0 0 2 2

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 Kimberly Po Messerli Mareen Louie Harper
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
13 — — — — — — — 1974 2–1 66.7% — 1,523 0 0
15 — — — — — — — 1976 1–2 33.3% — 1,521 0 0
16 — — — — — — — 1977 0–2 0.0% — 1,519 0 0
17 1989 0–1 0.0% — 1,486 0 0 1978 7–12 36.8% — 1,588 0 0
18 — — — — — — — 1979 4–13 23.5% — 1,568 0 0
19 1991 5–4 55.6% — 1,568 0 0 1980 22–23 48.9% — 1,714 0 0
20 1992 14–16 46.7% — 1,654 0 0 1981 16–20 44.4% — 1,743 0 0
21 1993 20–19 51.3% — 1,776 0 0 1982 9–18 33.3% — 1,654 0 0
22 1994 11–17 39.3% — 1,701 0 0 1983 7–10 41.2% — 1,671 0 0
23 1995 4–13 23.5% — 1,609 0 0 1984 18–17 51.4% — 1,733 0 1
24 1996 20–13 60.6% — 1,806 0 0 1985 29–18 61.7% — 1,776 0 2
25 1997 27–20 57.4% — 1,790 0 0 1986 12–17 41.4% — 1,679 0 2
26 1998 11–15 42.3% — 1,743 0 0 1987 9–16 36.0% — 1,623 0 2
27 1999 6–13 31.6% — 1,653 0 0 1988 12–17 41.4% — 1,613 0 2
28 2000 0–2 0.0% — 1,611 0 0 1989 6–14 30.0% — 1,576 0 2
29 — — — — — — — 1990 10–15 40.0% — 1,590 0 2
30 — — — — — — — 1991 12–16 42.9% — 1,614 0 2
31 — — — — — — — 1992 1–7 12.5% — 1,545 0 2
33 — — — — — — — 1994 0–1 0.0% — 1,536 0 2

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 Kimberly Po Messerli Mareen Louie Harper
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 %
13 — — — — — — — — — — — — — — — — — 1974 2 1 3 66.7% — — — — — — — — — — — —
15 — — — — — — — — — — — — — — — — — 1976 — — — — 0 1 1 0.0% 1 1 2 50.0% — — — —
16 — — — — — — — — — — — — — — — — — 1977 — — — — 0 1 1 0.0% — — — — 0 1 1 0.0%
17 1989 0 1 1 0.0% — — — — — — — — — — — — 1978 4 5 9 44.4% 3 3 6 50.0% — — — — 0 4 4 0.0%
18 — — — — — — — — — — — — — — — — — 1979 2 6 8 25.0% 0 1 1 0.0% 0 1 1 0.0% 2 5 7 28.6%
19 1991 5 4 9 55.6% — — — — — — — — — — — — 1980 7 8 15 46.7% 3 2 5 60.0% 5 2 7 71.4% 7 11 18 38.9%
20 1992 9 10 19 47.4% 0 1 1 0.0% 4 3 7 57.1% 1 2 3 33.3% 1981 5 7 12 41.7% 1 1 2 50.0% 1 2 3 33.3% 9 10 19 47.4%
21 1993 10 9 19 52.6% 2 2 4 50.0% 2 3 5 40.0% 6 5 11 54.5% 1982 4 6 10 40.0% 2 1 3 66.7% 0 2 2 0.0% 3 9 12 25.0%
22 1994 3 6 9 33.3% 2 4 6 33.3% 1 2 3 33.3% 5 5 10 50.0% 1983 5 5 10 50.0% — — — — — — — — 2 5 7 28.6%
23 1995 3 4 7 42.9% 0 5 5 0.0% 0 2 2 0.0% 1 2 3 33.3% 1984 14 9 23 60.9% 0 1 1 0.0% 1 3 4 25.0% 3 4 7 42.9%
24 1996 13 6 19 68.4% — — — — 1 2 3 33.3% 6 5 11 54.5% 1985 18 9 27 66.7% 0 2 2 0.0% 2 2 4 50.0% 9 5 14 64.3%
25 1997 21 13 34 61.8% 2 2 4 50.0% 1 2 3 33.3% 3 3 6 50.0% 1986 8 7 15 53.3% — — — — 1 2 3 33.3% 3 8 11 27.3%
26 1998 5 8 13 38.5% 1 3 4 25.0% 4 2 6 66.7% 1 2 3 33.3% 1987 6 8 14 42.9% 0 2 2 0.0% 2 3 5 40.0% 1 3 4 25.0%
27 1999 3 6 9 33.3% 1 3 4 25.0% 2 2 4 50.0% 0 2 2 0.0% 1988 8 11 19 42.1% 1 1 2 50.0% 0 2 2 0.0% 3 3 6 50.0%
28 2000 — — — — — — — — 0 1 1 0.0% 0 1 1 0.0% 1989 3 9 12 25.0% — — — — 2 3 5 40.0% 1 2 3 33.3%
29 — — — — — — — — — — — — — — — — — 1990 8 10 18 44.4% — — — — 0 2 2 0.0% 2 3 5 40.0%
30 — — — — — — — — — — — — — — — — — 1991 9 11 20 45.0% — — — — 1 2 3 33.3% 2 3 5 40.0%
31 — — — — — — — — — — — — — — — — — 1992 1 5 6 16.7% — — — — — — — — 0 2 2 0.0%
33 — — — — — — — — — — — — — — — — — 1994 0 1 1 0.0% — — — — — — — — — — — —
Career — 72 67 139 51.8% 8 20 28 28.6% 15 19 34 44.1% 23 27 50 46.0% — 104 118 222 46.8% 10 16 26 38.5% 16 27 43 37.2% 47 78 125 37.6%

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 Kimberly Po Messerli Mareen Louie Harper
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
13 — — — — — — — — — — — — — — — — 1974 1524 102.4 — — — — +72 — — 57.1% +0.29 1–0 1–0 — +0.56
15 — — — — — — — — — — — — — — — — 1976 1522 100.6 — — — — — — — 42.9% -0.57 0–1 — — +0.36
16 — — — — — — — — — — — — — — — — 1977 1520 116.3 — — — — — — — 0.0% -3.50 — 0–1 — -0.35
17 1989 1486 97.5 — — — — — — — 0.0% -2.50 — 0–1 — +0.12 1978 1589 122.4 — — — — +31 -31 — 34.1% -1.25 5–1 (83%) 2–1 (67%) 108.1 -0.33
18 — — — — — — — — — — — — — — — — 1979 1568 121.3 — — — — +25 — — 30.0% -1.90 2–4 (33%) 2–1 (67%) — +0.42
19 1991 1568 120.4 — — — — +29 — — 56.5% -0.26 2–3 (40%) 1–0 — -0.01 1980 1714 128.5 — — — — -41 -153 -36 46.2% -0.59 12–4 (75%) 2–6 (25%) 107.6 +1.57
20 1992 1655 127.7 — — — — -8 — -30 45.6% -0.40 5–5 (50%) 4–2 (67%) 103.5 +0.99 1981 1743 134.3 — — — — -2 — -72 42.7% -0.51 7–5 (58%) 4–2 (67%) 105.0 -1.63
21 1993 1777 145.0 — — — — +17 -217 -153 50.0% -0.15 6–4 (60%) 5–2 (71%) 106.5 -0.91 1982 1655 124.8 — — — — -27 -46 — 35.5% -1.06 4–4 (50%) 1–2 (33%) 99.6 -1.27
22 1994 1702 128.7 — — — — +38 -143 -106 44.6% -0.51 4–7 (36%) 2–2 (50%) — -0.08 1983 1671 132.0 — — — — -14 — — 42.9% -0.43 2–1 (67%) 1–2 (33%) 100.4 -0.99
23 1995 1610 120.0 — — — — +98 -130 — 29.7% -1.11 0–3 (0%) 1–3 (25%) 93.6 +0.25 1984 1733 127.5 — — — — +24 — -94 48.8% -0.05 7–3 (70%) 2–3 (40%) 105.0 +0.67
24 1996 1807 155.2 — — — — +52 — -239 57.5% +0.44 5–4 (56%) 1–1 — +0.41 1985 1777 143.7 — — — — +52 — -157 58.5% +0.41 8–4 (67%) 5–5 (50%) 101.8 -0.01
25 1997 1790 146.8 — — — — +28 -289 -240 55.0% +0.44 9–8 (53%) 7–2 (78%) 103.7 +1.04 1986 1680 121.2 — — — — +20 — -65 39.1% -0.55 5–3 (63%) 2–5 (29%) 97.5 +1.39
26 1998 1743 135.6 — — — — +16 -267 -100 44.8% -0.59 2–4 (33%) 4–1 (80%) 102.7 -0.85 1987 1624 119.5 — — — — +6 — -17 38.6% -0.67 3–4 (43%) 1–1 — +0.33
27 1999 1653 120.4 — — — — +21 -179 -26 38.1% -1.00 0–4 (0%) 1–4 (20%) 93.6 -1.39 1988 1614 129.1 — — — — +11 — — 43.3% -0.43 4–5 (44%) 5–4 (56%) 100.4 -0.29
28 2000 1611 101.2 — — — — — — — 20.0% -1.00 0–1 0–2 — +0.12 1989 1576 117.3 — — — — -17 — -21 32.0% -1.38 6–4 (60%) 6–1 (86%) 107.4 -1.33
29 — — — — — — — — — — — — — — — — 1990 1590 128.4 — — — — +10 — — 45.8% -0.14 2–7 (22%) 1–3 (25%) 94.5 +0.31
30 — — — — — — — — — — — — — — — — 1991 1615 127.2 — — — — -4 — -50 39.4% -0.53 8–4 (67%) 4–4 (50%) 105.2 +0.46
31 — — — — — — — — — — — — — — — — 1992 1545 105.4 — — — — -7 — — 25.0% -1.81 0–2 1–0 — -0.11
33 — — — — — — — — — — — — — — — — 1994 1537 103.8 — — — — — — — 0.0% -2.50 — 0–1 — -0.17
Career — 1880 144.9 — — — — +29 -197 -111 47.9% -0.22 33–43 (43%) 26–20 (57%) 102.5 -0.12 — 1911 135.2 — — — — +7 -78 -59 42.4% -0.57 76–56 (58%) 40–42 (49%) 107.5 -0.10

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.