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

Janet Newberry vs Yvonne Vermaak H2H: 1-1

Janet Newberry and Yvonne Vermaak are tied 1–1 in their WTA head-to-head. Across 2 main-draw meetings, Janet Newberry leads 1–0 on clay, while Yvonne Vermaak leads 1–0 on grass. Most recently, Yvonne Vermaak won the 1977 Chichester round of 32 6-2 7-6.

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Janet Newberry
USA Age 73 Right-Handed 170 cm / 5'7"
H2H
1 – 1
2 main-draw meetings
Yvonne Vermaak
RSA Age 69 Right-Handed 155 cm / 5'1"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Yvonne Vermaak 6-2 7-6 Janet Newberry Match data Jun 9, 1977* R32 Chichester WTA 250 Grass
Janet Newberry 7-5 3-6 6-1 Yvonne Vermaak Match data May 16, 1975* R16 Bournemouth WTA 250 Clay

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
Janet Newberry — — — 1,922 238 187 56.0% 0 0 0 1 7 8
Yvonne Vermaak #558 #38 10 1,892 239 249 49.0% 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 Janet Newberry Yvonne Vermaak
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
14 1968 7–5 58.3% — 1,542 0 0 — — — — — — —
15 1969 13–6 68.4% — 1,631 0 2 — — — — — — —
16 1970 20–7 74.1% — 1,718 0 5 1973 0–2 0.0% — 1,495 0 0
17 1971 15–9 62.5% — 1,757 0 5 1974 1–2 33.3% — 1,489 0 0
18 1972 20–17 54.1% — 1,707 0 5 1975 15–12 55.6% — 1,599 0 0
19 1973 32–24 57.1% — 1,851 0 5 1976 8–10 44.4% — 1,606 0 1
20 1974 22–22 50.0% — 1,812 0 5 1977 20–14 58.8% — 1,765 0 2
21 1975 31–22 58.5% — 1,903 0 6 1978 29–23 55.8% — 1,791 0 2
22 1976 14–10 58.3% — 1,862 0 6 1979 15–23 39.5% — 1,779 0 2
23 1977 25–22 53.2% — 1,875 0 7 1980 19–18 51.4% — 1,741 0 2
24 1978 15–14 51.7% — 1,831 0 7 1981 19–28 40.4% — 1,719 0 2
25 1979 12–21 36.4% — 1,680 0 7 1982 36–27 57.1% — 1,820 0 2
26 1980 12–8 60.0% — 1,643 0 8 1983 33–26 55.9% — 1,754 0 4
27 — — — — — — — 1984 29–28 50.9% #41 1,800 0 5
28 — — — — — — — 1985 8–21 27.6% #41 1,604 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 1,541 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 Janet Newberry 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 %
14 1968 7 5 12 58.3% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
15 1969 12 4 16 75.0% — — — — 1 2 3 33.3% — — — — — — — — — — — — — — — — — — — — —
16 1970 15 3 18 83.3% 2 1 3 66.7% 3 3 6 50.0% — — — — 1973 0 2 2 0.0% — — — — — — — — — — — —
17 1971 2 2 4 50.0% 1 1 2 50.0% 12 6 18 66.7% — — — — 1974 1 2 3 33.3% — — — — — — — — — — — —
18 1972 6 4 10 60.0% 6 6 12 50.0% 6 6 12 50.0% — — — — 1975 4 3 7 57.1% 7 4 11 63.6% 3 4 7 42.9% — — — —
19 1973 6 5 11 54.5% 10 5 15 66.7% 8 5 13 61.5% 8 9 17 47.1% 1976 1 1 2 50.0% 7 6 13 53.8% 0 2 2 0.0% 0 1 1 0.0%
20 1974 4 5 9 44.4% 1 4 5 20.0% 8 4 12 66.7% 9 9 18 50.0% 1977 3 2 5 60.0% 6 7 13 46.2% 8 2 10 80.0% 3 3 6 50.0%
21 1975 7 5 12 58.3% 20 9 29 69.0% 3 2 5 60.0% 1 6 7 14.3% 1978 13 7 20 65.0% 2 2 4 50.0% 8 4 12 66.7% 6 10 16 37.5%
22 1976 1 2 3 33.3% 9 4 13 69.2% 2 2 4 50.0% 2 2 4 50.0% 1979 4 6 10 40.0% 4 4 8 50.0% 5 4 9 55.6% 2 9 11 18.2%
23 1977 4 4 8 50.0% 13 7 20 65.0% 3 3 6 50.0% 5 8 13 38.5% 1980 2 5 7 28.6% 9 5 14 64.3% 4 4 8 50.0% 4 4 8 50.0%
24 1978 1 2 3 33.3% 7 5 12 58.3% 5 3 8 62.5% 2 4 6 33.3% 1981 7 9 16 43.8% 11 9 20 55.0% 0 1 1 0.0% 1 9 10 10.0%
25 1979 2 4 6 33.3% 2 5 7 28.6% 5 5 10 50.0% 1 5 6 16.7% 1982 4 4 8 50.0% 13 7 20 65.0% 9 6 15 60.0% 10 10 20 50.0%
26 1980 6 5 11 54.5% 1 1 2 50.0% 4 0 4 100.0% — — — — 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 — 73 50 123 59.3% 72 48 120 60.0% 60 41 101 59.4% 28 43 71 39.4% — 72 64 136 52.9% 78 72 150 52.0% 55 44 99 55.6% 33 68 101 32.7%

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 Janet Newberry 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
14 1968 1542 104.3 — — — — +45 — — 55.6% +0.41 2–1 (67%) — — +0.69 — — — — — — — — — — — — — — — —
15 1969 1632 120.1 — — — — +106 — -86 67.4% +1.19 2–3 (40%) — — +1.11 — — — — — — — — — — — — — — — —
16 1970 1719 128.8 — — — — +177 -163 -147 70.0% +1.70 4–4 (50%) 0–1 — +3.95 1973 1496 101.8 — — — — — — — 20.0% -3.20 0–1 — — -0.39
17 1971 1758 132.0 — — — — +111 — -30 56.9% +0.65 4–1 (80%) — — +0.89 1974 1489 99.2 — — — — +44 — — 42.9% -0.71 0–1 — — +0.69
18 1972 1707 131.6 — — — — +164 -98 -1 54.3% +0.39 5–4 (56%) 0–2 — -0.95 1975 1599 120.1 — — — — +53 -2 -47 57.1% +0.46 3–6 (33%) 3–0 (100%) 100.2 +2.43
19 1973 1852 140.9 — — — — -29 -44 -119 55.8% +0.08 11–8 (58%) 7–1 (88%) 106.5 -4.59 1976 1607 119.9 — — — — -10 +40 — 48.8% +0.09 2–5 (29%) 1–3 (25%) — +0.96
20 1974 1813 140.5 — — — — -4 -63 -20 50.5% +0.13 4–5 (44%) 5–5 (50%) 99.4 -2.47 1977 1765 138.0 — — — — -79 -79 -75 58.1% +0.41 3–3 (50%) 6–5 (55%) 102.4 +0.27
21 1975 1904 152.7 — — — — -63 +15 -117 57.6% +0.47 6–6 (50%) 6–1 (86%) 104.5 -5.60 1978 1791 135.3 — — — — +3 -132 -30 52.6% +0.33 8–6 (57%) 2–6 (25%) 99.2 +2.99
22 1976 1863 123.7 — — — — -83 +57 -40 51.8% -0.23 7–1 (88%) 3–1 (75%) 107.1 -1.77 1979 1780 155.2 — — — — -44 -74 +25 40.5% -0.50 4–4 (50%) 1–2 (33%) 99.0 -4.03
23 1977 1875 146.0 — — — — -74 +55 -101 52.8% +0.28 6–6 (50%) 2–5 (29%) 95.9 -3.22 1980 1742 138.8 — — — — -89 +32 +50 52.5% +0.26 2–4 (33%) 4–3 (57%) 99.5 -4.96
24 1978 1831 138.7 — — — — -69 +30 +11 50.7% +0.12 5–4 (56%) 0–4 (0%) 95.6 -2.30 1981 1720 143.5 — — — — -64 +96 — 43.1% -0.39 4–6 (40%) 1–5 (17%) 96.9 -2.78
25 1979 1681 129.3 — — — — +2 +125 +112 39.1% -0.90 2–3 (40%) 4–4 (50%) 97.3 +0.41 1982 1820 142.9 — — — — -77 +69 -9 55.2% +0.06 11–10 (52%) 9–10 (47%) 99.8 -3.53
26 1980 1644 112.8 — — — — -10 — +207 60.0% +0.76 4–3 (57%) 1–1 — +2.97 1983 1755 138.0 — — — — +7 +104 +97 55.4% +0.20 10–11 (48%) 7–3 (70%) 100.0 +1.14
27 — — — — — — — — — — — — — — — — 1984 1801 134.8 — — — — -65 -14 +95 53.1% +0.15 5–11 (31%) 7–8 (47%) 94.0 -0.64
28 — — — — — — — — — — — — — — — — 1985 1605 125.4 — — — — +10 +114 +210 37.7% -0.97 1–10 (9%) 0–1 — -0.99
29 — — — — — — — — — — — — — — — — 1986 1565 105.1 — — — — +19 +86 +196 36.8% -0.87 2–2 (50%) 0–1 — 0.00
30 — — — — — — — — — — — — — — — — 1987 1558 108.1 — — — — — — — 25.0% -2.38 — — — -0.56
31 — — — — — — — — — — — — — — — — 1988 1542 94.0 — — — — — — — 0.0% -4.00 — — — +0.11
Career — 1922 142.9 — — — — +13 +8 -28 54.9% +0.32 62–49 (56%) 28–25 (53%) 101.7 -2.59 — 1892 141.9 — — — — -33 +33 +34 50.0% -0.05 55–80 (41%) 41–47 (47%) 93.1 -1.91

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.