H2H data updated: 2026-10-27 00:00 UTC

Sherry Acker vs Yvonne Vermaak H2H: 2-0

Sherry Acker holds a 2–0 lead over Yvonne Vermaak in their WTA head-to-head. Across 2 main-draw meetings, Sherry Acker leads 2–0 on carpet. Most recently, Sherry Acker won the 1984 Pittsburgh round of 32 6-4 6-7 7-5.

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Sherry Acker
USA Age 67 Right-Handed 173 cm / 5'8"
H2H
2 – 0
2 main-draw meetings
Yvonne Vermaak
RSA Age 69 Right-Handed 155 cm / 5'1"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Sherry Acker 6-4 6-7 7-5 Yvonne Vermaak #41 Match data Jan 26, 1984* R32 Pittsburgh WTA 250 Carpet
Sherry Acker 6-0 6-1 Yvonne Vermaak Match data Sep 26, 1979* R32 Atlanta WTA 250 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 1000 including documented historical predecessor categories Finals 500 including documented historical predecessor categories 250 including documented historical predecessor categories Titles
Sherry Acker — — — 1,844 63 100 38.7% 0 0 0 0 0 0
Yvonne Vermaak — #38 10 1,892 239 250 48.9% 0 0 0 0 5 5

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 Sherry Acker Yvonne Vermaak
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 — — — — — — — 1973 0–2 0.0% — 1,495 0 0
17 — — — — — — — 1974 1–2 33.3% — 1,489 0 0
18 — — — — — — — 1975 15–12 55.6% — 1,599 0 0
19 — — — — — — — 1976 8–10 44.4% — 1,606 0 1
20 1979 13–21 38.2% — 1,591 0 0 1977 20–14 58.8% — 1,765 0 2
21 1980 29–31 48.3% — 1,832 0 0 1978 29–23 55.8% — 1,794 0 2
22 1981 8–19 29.6% — 1,682 0 0 1979 15–23 39.5% — 1,781 0 2
23 1982 1–5 16.7% — 1,632 0 0 1980 19–19 50.0% — 1,735 0 2
24 1983 11–15 42.3% — 1,619 0 0 1981 19–28 40.4% — 1,720 0 2
25 1984 1–9 10.0% — 1,524 0 0 1982 36–27 57.1% — 1,821 0 2
26 — — — — — — — 1983 33–26 55.9% — 1,755 0 4
27 — — — — — — — 1984 29–28 50.9% #41 1,801 0 5
28 — — — — — — — 1985 8–21 27.6% — 1,605 0 5
29 — — — — — — — 1986 6–11 35.3% #104 1,565 0 5
30 — — — — — — — 1987 1–3 25.0% #201 1,558 0 5
31 — — — — — — — 1988 0–1 0.0% #287 1,542 0 5

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 Sherry Acker Yvonne Vermaak
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 — — — — — — — — — — — — — — — — — 1973 0 2 2 0.0% — — — — — — — — — — — —
17 — — — — — — — — — — — — — — — — — 1974 1 2 3 33.3% — — — — — — — — — — — —
18 — — — — — — — — — — — — — — — — — 1975 4 3 7 57.1% 7 4 11 63.6% 3 4 7 42.9% — — — —
19 — — — — — — — — — — — — — — — — — 1976 1 1 2 50.0% 7 6 13 53.8% 0 2 2 0.0% 0 1 1 0.0%
20 1979 7 6 13 53.8% 3 5 8 37.5% 1 6 7 14.3% 2 4 6 33.3% 1977 3 2 5 60.0% 6 7 13 46.2% 8 2 10 80.0% 3 3 6 50.0%
21 1980 5 6 11 45.5% 3 4 7 42.9% 4 3 7 57.1% 17 18 35 48.6% 1978 13 7 20 65.0% 2 2 4 50.0% 8 4 12 66.7% 6 10 16 37.5%
22 1981 4 5 9 44.4% 1 2 3 33.3% 2 6 8 25.0% 1 6 7 14.3% 1979 4 6 10 40.0% 4 4 8 50.0% 5 4 9 55.6% 2 9 11 18.2%
23 1982 0 1 1 0.0% 0 1 1 0.0% 1 2 3 33.3% 0 1 1 0.0% 1980 2 5 7 28.6% 9 5 14 64.3% 4 4 8 50.0% 4 5 9 44.4%
24 1983 4 6 10 40.0% 0 1 1 0.0% 6 6 12 50.0% 1 2 3 33.3% 1981 7 9 16 43.8% 11 9 20 55.0% 0 1 1 0.0% 1 9 10 10.0%
25 1984 0 5 5 0.0% — — — — 0 2 2 0.0% 1 2 3 33.3% 1982 4 4 8 50.0% 13 7 20 65.0% 9 6 15 60.0% 10 10 20 50.0%
26 — — — — — — — — — — — — — — — — — 1983 14 4 18 77.8% 7 8 15 46.7% 8 5 13 61.5% 4 9 13 30.8%
27 — — — — — — — — — — — — — — — — — 1984 12 7 19 63.2% 7 8 15 46.7% 8 6 14 57.1% 2 7 9 22.2%
28 — — — — — — — — — — — — — — — — — 1985 5 8 13 38.5% 1 4 5 20.0% 1 3 4 25.0% 1 6 7 14.3%
29 — — — — — — — — — — — — — — — — — 1986 1 2 3 33.3% 4 6 10 40.0% 1 3 4 25.0% — — — —
30 — — — — — — — — — — — — — — — — — 1987 1 1 2 50.0% 0 2 2 0.0% — — — — — — — —
31 — — — — — — — — — — — — — — — — — 1988 0 1 1 0.0% — — — — — — — — — — — —
Career — 20 29 49 40.8% 7 13 20 35.0% 14 25 39 35.9% 22 33 55 40.0% — 72 64 136 52.9% 78 72 150 52.0% 55 44 99 55.6% 33 69 102 32.4%

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 Sherry Acker Yvonne Vermaak
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 — — — — — — — — — — — — — — — — 1973 1496 101.8 — — — — — — — 20.0% -3.20 0–1 — — -0.39
17 — — — — — — — — — — — — — — — — 1974 1489 99.2 — — — — +43 — — 42.9% -0.71 0–1 — — +0.69
18 — — — — — — — — — — — — — — — — 1975 1599 120.1 — — — — +53 -2 -47 57.1% +0.46 3–6 (33%) 3–0 (100%) 100.2 +2.23
19 — — — — — — — — — — — — — — — — 1976 1607 119.9 — — — — -10 +39 — 48.8% +0.09 2–5 (29%) 1–3 (25%) — +0.77
20 1979 1592 125.7 — — — — +77 -54 -63 40.0% -0.87 2–4 (33%) 2–3 (40%) 98.5 +2.58 1977 1766 138.3 — — — — -80 -80 -75 58.1% +0.41 3–3 (50%) 6–5 (55%) 102.5 -0.04
21 1980 1833 147.5 — — — — +12 -287 -234 47.8% -0.02 10–8 (56%) 6–6 (50%) 106.3 -3.15 1978 1794 135.9 — — — — +3 -135 -32 52.6% +0.33 8–6 (57%) 2–6 (25%) 99.2 +2.36
22 1981 1683 125.7 — — — — +54 -94 -123 33.3% -0.87 2–5 (29%) 2–5 (29%) 94.0 -2.47 1979 1781 155.4 — — — — -43 -75 +23 40.5% -0.50 4–4 (50%) 1–2 (33%) 99.0 -4.15
23 1982 1632 123.1 — — — — — — -42 33.3% -0.87 0–3 (0%) 1–2 (33%) — +0.18 1980 1735 137.1 — — — — -93 +40 +57 51.2% +0.13 2–4 (33%) 4–3 (57%) 99.6 -4.28
24 1983 1620 119.1 — — — — +5 — +38 39.3% -0.70 4–2 (67%) 3–4 (43%) 102.8 +0.08 1981 1720 144.0 — — — — -67 +97 — 43.1% -0.39 4–6 (40%) 1–5 (17%) 97.0 -2.56
25 1984 1524 98.7 — — — — -5 — — 24.0% -1.40 1–4 (20%) 1–3 (25%) 95.3 +0.60 1982 1821 143.1 — — — — -78 +69 -9 55.2% +0.06 11–10 (52%) 9–10 (47%) 99.9 -2.99
26 — — — — — — — — — — — — — — — — 1983 1755 138.2 — — — — +8 +105 +98 55.4% +0.20 10–11 (48%) 7–3 (70%) 100.1 +1.01
27 — — — — — — — — — — — — — — — — 1984 1801 135.0 — — — — -65 -14 +95 53.1% +0.15 5–11 (31%) 7–8 (47%) 94.0 -0.27
28 — — — — — — — — — — — — — — — — 1985 1605 125.4 — — — — +12 +115 +210 37.7% -0.97 1–10 (9%) 0–1 — -0.88
29 — — — — — — — — — — — — — — — — 1986 1566 105.2 — — — — +20 +85 +195 36.8% -0.87 2–2 (50%) 0–1 — -0.31
30 — — — — — — — — — — — — — — — — 1987 1559 108.1 — — — — — — — 25.0% -2.38 — — — -0.55
31 — — — — — — — — — — — — — — — — 1988 1542 94.0 — — — — — — — 0.0% -4.00 — — — +0.11
Career — 1844 135.7 — — — — +28 -151 -74 40.4% -0.56 19–26 (42%) 15–23 (39%) 97.2 -1.35 — 1893 142.0 — — — — -34 +34 +34 50.0% -0.06 55–80 (41%) 41–47 (47%) 93.2 -1.90

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.