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

Louise Allen vs Naoko Sawamatsu H2H: 0-3

Naoko Sawamatsu holds a 3–0 lead over Louise Allen in their WTA head-to-head. Across 3 main-draw meetings, Naoko Sawamatsu leads 2–0 on hard courts and 1–0 on grass. Most recently, Naoko Sawamatsu won the 1993 Eastbourne Open round of 64 6-2 6-3.

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Louise Allen
USA Age 64
H2H
0 – 3
3 main-draw meetings
Naoko Sawamatsu
JPN Age 53 Right-Handed 167 cm / 5'6"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Naoko Sawamatsu #20 6-2 6-3 Louise Allen Match data Jun 16, 1993* R64 Eastbourne Open Tier II → modern equivalent WTA 500 Grass
Naoko Sawamatsu #30 6-1 6-0 Louise Allen Match data Aug 20, 1992* R32 Canadian Open Tier I → modern equivalent WTA 1000 Hard
Naoko Sawamatsu #180 7-6 7-5 Louise Allen Match data Apr 14, 1990* R16 Tokyo Japan Open Tier IV → 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
Louise Allen — — — 1,758 67 100 40.1% 0 0 0 0 3 3
Naoko Sawamatsu #266 #14 881 1,970 183 129 58.7% 0 0 0 0 4 4

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 Louise Allen Naoko Sawamatsu
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 — — — — — — — 1989 0–2 0.0% #262 1,477 0 0
17 — — — — — — — 1990 14–6 70.0% #31 1,669 0 1
18 1980 3–2 60.0% — 1,519 0 0 1991 21–16 56.8% #33 1,723 0 1
19 1981 6–5 54.5% — 1,540 0 0 1992 23–13 63.9% #24 1,856 0 1
20 1982 22–5 81.5% — 1,736 0 3 1993 24–13 64.9% #28 1,853 0 2
21 1983 3–7 30.0% — 1,706 0 3 1994 24–12 66.7% #26 1,870 0 3
22 1984 0–1 0.0% — 1,685 0 3 1995 22–13 62.9% #17 1,847 0 3
23 — — — — — — — 1996 19–17 52.8% #38 1,811 0 3
24 1986 0–4 0.0% — 1,611 0 3 1997 24–19 55.8% #34 1,849 0 4
25 1987 3–8 27.3% — 1,564 0 3 1998 12–18 40.0% #55 1,721 0 4
26 1988 5–8 38.5% — 1,584 0 3 — — — — — — —
27 1989 9–15 37.5% — 1,561 0 3 — — — — — — —
28 1990 2–9 18.2% — 1,492 0 3 — — — — — — —
29 1991 2–8 20.0% — 1,453 0 3 — — — — — — —
30 1992 10–14 41.7% — 1,576 0 3 — — — — — — —
31 1993 2–14 12.5% — 1,451 0 3 — — — — — — —

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 Louise Allen Naoko Sawamatsu
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 — — — — — — — — — — — — — — — — — 1989 0 1 1 0.0% — — — — — — — — 0 1 1 0.0%
17 — — — — — — — — — — — — — — — — — 1990 13 3 16 81.3% 1 1 2 50.0% 0 2 2 0.0% — — — —
18 — — — — — — — — — — — — — — — — — 1991 13 10 23 56.5% 7 3 10 70.0% 1 2 3 33.3% 0 1 1 0.0%
19 1981 0 1 1 0.0% — — — — — — — — — — — — 1992 13 7 20 65.0% 5 4 9 55.6% 3 1 4 75.0% 2 1 3 66.7%
20 1982 13 4 17 76.5% 0 1 1 0.0% — — — — — — — — 1993 12 8 20 60.0% 7 2 9 77.8% 4 2 6 66.7% 1 1 2 50.0%
21 1983 1 1 2 50.0% 0 3 3 0.0% 2 3 5 40.0% — — — — 1994 15 7 22 68.2% 5 3 8 62.5% 4 2 6 66.7% — — — —
22 1984 0 1 1 0.0% — — — — — — — — — — — — 1995 14 8 22 63.6% 4 3 7 57.1% 2 1 3 66.7% 2 1 3 66.7%
23 — — — — — — — — — — — — — — — — — 1996 11 11 22 50.0% 4 3 7 57.1% 2 2 4 50.0% 2 1 3 66.7%
24 1986 0 2 2 0.0% 0 1 1 0.0% 0 1 1 0.0% — — — — 1997 20 12 32 62.5% 0 3 3 0.0% 2 2 4 50.0% 2 2 4 50.0%
25 1987 1 3 4 25.0% 2 2 4 50.0% 0 1 1 0.0% 0 2 2 0.0% 1998 6 10 16 37.5% 3 5 8 37.5% 2 2 4 50.0% 1 1 2 50.0%
26 1988 5 7 12 41.7% — — — — — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
27 1989 8 12 20 40.0% 0 1 1 0.0% 1 1 2 50.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
28 1990 2 8 10 20.0% — — — — — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
29 1991 2 6 8 25.0% 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
30 1992 7 5 12 58.3% 1 4 5 20.0% 2 3 5 40.0% 0 2 2 0.0% — — — — — — — — — — — — — — — — —
31 1993 1 6 7 14.3% 1 2 3 33.3% 0 3 3 0.0% 0 3 3 0.0% — — — — — — — — — — — — — — — — —
Career — 40 56 96 41.7% 4 16 20 20.0% 5 12 17 29.4% 0 10 10 0.0% — 117 77 194 60.3% 36 27 63 57.1% 20 16 36 55.6% 10 9 19 52.6%

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 Louise Allen Naoko Sawamatsu
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 — — — — — — — — — — — — — — — — 1989 1477 96.0 — — — — — — — 20.0% -2.20 0–1 — — +0.30
17 — — — — — — — — — — — — — — — — 1990 1669 124.7 — — — — +57 — — 62.5% +0.77 6–2 (75%) 5–1 (83%) 110.2 +1.75
18 1980 1520 102.6 — — — — — — — 60.0% +0.40 2–0 1–0 — +0.07 1991 1724 133.2 — — — — -8 -44 -170 55.4% +0.49 5–6 (45%) 1–1 — +2.14
19 1981 1540 111.9 — — — — — — — 53.6% +0.64 3–3 (50%) 1–3 (25%) 98.7 -0.03 1992 1857 143.8 — — — — -17 -155 -248 60.7% +0.42 7–5 (58%) 4–2 (67%) 104.0 -0.25
20 1982 1736 132.6 — — — — -16 — — 75.4% +2.03 5–2 (71%) 2–2 (50%) 103.9 +2.84 1993 1853 139.0 — — — — -68 -33 -152 62.1% +0.86 7–6 (54%) 2–0 — +0.17
21 1983 1706 117.7 — — — — — -183 -107 33.3% -1.67 0–1 1–1 — -0.80 1994 1871 146.2 — — — — -20 -58 -130 60.7% +1.00 9–3 (75%) 4–3 (57%) 106.5 -0.99
22 1984 1686 96.2 — — — — — — — 33.3% -2.67 0–1 — — +0.11 1995 1848 150.6 — — — — +59 -74 -92 58.6% +0.48 10–7 (59%) 6–3 (67%) 103.1 +1.09
23 — — — — — — — — — — — — — — — — 1996 1812 145.0 — — — — +5 +4 -6 53.2% +0.02 5–6 (45%) 3–2 (60%) 97.8 -0.27
24 1986 1612 101.4 — — — — — — — 20.0% -1.50 0–2 0–2 — +0.38 1997 1850 153.6 — — — — +44 -92 -62 54.0% +0.35 10–6 (63%) 5–5 (50%) 103.9 -1.59
25 1987 1565 110.9 — — — — +20 -55 — 32.0% -1.28 1–2 (33%) 1–2 (33%) 97.0 +0.16 1998 1721 125.2 — — — — +37 -25 +64 40.5% -0.62 8–6 (57%) 1–1 — -0.88
26 1988 1584 119.3 — — — — -2 — — 45.7% -0.20 3–6 (33%) 2–2 (50%) 97.4 -0.03 — — — — — — — — — — — — — — — —
27 1989 1561 113.9 — — — — -23 — — 43.1% -0.66 3–7 (30%) 5–2 (71%) 100.1 +0.22 — — — — — — — — — — — — — — — —
28 1990 1493 106.1 — — — — -19 — — 21.7% -1.39 0–1 0–3 (0%) — +0.64 — — — — — — — — — — — — — — — —
29 1991 1453 100.2 — — — — -9 — — 31.8% -1.54 1–3 (25%) 1–0 — +0.75 — — — — — — — — — — — — — — — —
30 1992 1576 125.0 — — — — +2 -118 -27 41.8% -0.80 4–3 (57%) 2–2 (50%) 103.6 -0.19 — — — — — — — — — — — — — — — —
31 1993 1452 91.9 — — — — +19 +6 +65 20.6% -2.12 1–3 (25%) 2–3 (40%) 96.2 +0.76 — — — — — — — — — — — — — — — —
Career — 1759 120.5 — — — — -7 -89 -37 43.6% -0.45 23–34 (40%) 18–22 (45%) 95.9 +2.92 — 1971 148.7 — — — — +11 -58 -103 56.1% +0.40 67–48 (58%) 31–18 (63%) 109.3 +0.47

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.