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

Yukie Koizumi vs Karen Schimper H2H: 0-1

Karen Schimper holds a 1–0 lead over Yukie Koizumi in their WTA head-to-head. Across 1 main-draw meeting, Karen Schimper leads 1–0 on hard courts. Most recently, Karen Schimper won the 1988 Key Biscayne round of 64 7-6 6-3.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Yukie Koizumi
JPN Age 68
H2H
0 – 1
1 main-draw meetings
Karen Schimper
RSA Age 59

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Karen Schimper #100 7-6 6-3 Yukie Koizumi Match data Mar 16, 1988* R64 Key Biscayne Category 6 → 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
Yukie Koizumi — — — 1,503 10 22 31.2% 0 0 0 0 0 0
Karen Schimper #486 #75 11 1,650 24 43 35.8% 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 Yukie Koizumi Karen Schimper
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
20 — — — — — — — 1987 6–12 33.3% #102 1,528 0 0
21 — — — — — — — 1988 13–19 40.6% #93 1,580 0 0
22 1980 0–1 0.0% — 1,487 0 0 1989 5–10 33.3% #147 1,587 0 0
23 — — — — — — — 1990 0–2 0.0% #470 1,563 0 0
27 1985 0–1 0.0% — 1,473 0 0 — — — — — — —
29 1987 3–4 42.9% — 1,480 0 0 — — — — — — —
30 1988 3–5 37.5% — 1,473 0 0 — — — — — — —
31 1989 2–6 25.0% — 1,447 0 0 — — — — — — —
32 1990 2–4 33.3% — 1,440 0 0 — — — — — — —
33 1991 0–1 0.0% — 1,434 0 0 — — — — — — —

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 Yukie Koizumi Karen Schimper
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 %
20 — — — — — — — — — — — — — — — — — 1987 2 4 6 33.3% 4 5 9 44.4% 0 2 2 0.0% 0 1 1 0.0%
21 — — — — — — — — — — — — — — — — — 1988 7 10 17 41.2% 4 5 9 44.4% 2 3 5 40.0% 0 1 1 0.0%
22 1980 0 1 1 0.0% — — — — — — — — — — — — 1989 2 3 5 40.0% 3 5 8 37.5% 0 2 2 0.0% — — — —
23 — — — — — — — — — — — — — — — — — 1990 0 1 1 0.0% 0 1 1 0.0% — — — — — — — —
27 1985 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
29 1987 1 1 2 50.0% 0 1 1 0.0% 1 1 2 50.0% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
30 1988 2 4 6 33.3% — — — — — — — — 1 1 2 50.0% — — — — — — — — — — — — — — — — —
31 1989 2 6 8 25.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
32 1990 2 4 6 33.3% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
33 1991 — — — — — — — — — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
Career — 7 17 24 29.2% 0 1 1 0.0% 1 1 2 50.0% 2 3 5 40.0% — 11 18 29 37.9% 11 16 27 40.7% 2 7 9 22.2% 0 2 2 0.0%

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 Yukie Koizumi Karen Schimper
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
20 — — — — — — — — — — — — — — — — 1987 1528 119.5 — — — — +26 +54 — 38.6% -0.84 3–5 (38%) 3–1 (75%) 101.8 +0.03
21 — — — — — — — — — — — — — — — — 1988 1580 122.7 — — — — -33 +32 -17 38.4% -1.12 7–2 (78%) 4–2 (67%) 108.7 +0.45
22 1980 1487 97.4 — — — — — — — 33.3% -0.67 0–1 — — +0.06 1989 1588 124.1 — — — — -21 +37 — 33.3% -1.00 2–1 (67%) 1–3 (25%) 100.5 -1.87
23 — — — — — — — — — — — — — — — — 1990 1564 98.7 — — — — — — — 0.0% -3.50 — — — -0.04
27 1985 1473 98.8 — — — — — — — 33.3% -0.67 0–1 — — +0.19 — — — — — — — — — — — — — — — —
29 1987 1481 106.2 — — — — +53 — — 40.0% -0.07 1–0 0–2 — +1.04 — — — — — — — — — — — — — — — —
30 1988 1474 93.5 — — — — +18 — — 38.9% -1.11 1–1 1–2 (33%) — +0.84 — — — — — — — — — — — — — — — —
31 1989 1447 100.6 — — — — +12 — — 26.3% -1.00 2–1 (67%) — — +0.71 — — — — — — — — — — — — — — — —
32 1990 1441 88.9 — — — — +16 — — 28.6% -2.00 2–0 0–1 — +0.81 — — — — — — — — — — — — — — — —
33 1991 1435 102.4 — — — — — — — 0.0% -3.00 — — — +0.10 — — — — — — — — — — — — — — — —
Career — 1503 96.3 — — — — +21 — — 32.4% -1.05 6–4 (60%) 1–5 (17%) 100.2 +11.72 — 1651 123.9 — — — — -17 +41 -17 36.4% -1.08 12–8 (60%) 8–6 (57%) 108.5 -2.13

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.