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

Helen Gourlay vs Yvonne Vermaak H2H: 1-0

Helen Gourlay holds a 1–0 lead over Yvonne Vermaak in their WTA head-to-head. Across 1 main-draw meeting, Helen Gourlay leads 1–0 on clay. Most recently, Helen Gourlay won the 1978 Stuart round of 16 6-3 3-6 6-3.

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Helen Gourlay
AUS Age 79
H2H
1 – 0
1 main-draw meetings
Yvonne Vermaak
RSA Age 69 Right-Handed 155 cm / 5'1"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Helen Gourlay 6-3 3-6 6-3 Yvonne Vermaak Match data Apr 2, 1978* R16 Stuart 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
Helen Gourlay — — — 1,962 295 201 59.5% 0 0 0 0 7 7
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 Helen Gourlay 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 — — — — — — — 1977 20–14 58.8% — 1,765 0 2
21 1968 48–21 69.6% — 1,678 0 3 1978 29–23 55.8% — 1,791 0 2
22 1969 41–29 58.6% — 1,730 0 5 1979 15–23 39.5% — 1,779 0 2
23 1970 42–22 65.6% — 1,845 0 7 1980 19–18 51.4% — 1,741 0 2
24 1971 46–25 64.8% — 1,907 0 7 1981 19–28 40.4% — 1,719 0 2
25 1972 34–25 57.6% — 1,799 0 7 1982 36–27 57.1% — 1,820 0 2
26 1973 7–13 35.0% — 1,745 0 7 1983 33–26 55.9% — 1,754 0 4
27 1974 30–19 61.2% — 1,942 0 7 1984 29–28 50.9% #41 1,800 0 5
28 1975 8–14 36.4% — 1,841 0 7 1985 8–21 27.6% #41 1,604 0 5
29 1976 7–7 50.0% — 1,815 0 7 1986 6–11 35.3% #104 1,565 0 5
30 1977 24–19 55.8% — 1,897 0 7 1987 1–3 25.0% #201 1,558 0 5
31 1978 4–3 57.1% — 1,882 0 7 1988 0–1 0.0% #287 1,541 0 5
33 1980 4–4 50.0% — 1,796 0 7 — — — — — — —

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 Helen Gourlay 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 — — — — — — — — — — — — — — — — — 1977 3 2 5 60.0% 6 7 13 46.2% 8 2 10 80.0% 3 3 6 50.0%
21 1968 — — — — 34 10 44 77.3% 13 10 23 56.5% — — — — 1978 13 7 20 65.0% 2 2 4 50.0% 8 4 12 66.7% 6 10 16 37.5%
22 1969 4 3 7 57.1% 21 11 32 65.6% 13 10 23 56.5% 3 5 8 37.5% 1979 4 6 10 40.0% 4 4 8 50.0% 5 4 9 55.6% 2 9 11 18.2%
23 1970 14 7 21 66.7% 14 9 23 60.9% 14 6 20 70.0% — — — — 1980 2 5 7 28.6% 9 5 14 64.3% 4 4 8 50.0% 4 4 8 50.0%
24 1971 8 4 12 66.7% 14 7 21 66.7% 24 14 38 63.2% — — — — 1981 7 9 16 43.8% 11 9 20 55.0% 0 1 1 0.0% 1 9 10 10.0%
25 1972 4 2 6 66.7% 10 5 15 66.7% 14 10 24 58.3% 6 8 14 42.9% 1982 4 4 8 50.0% 13 7 20 65.0% 9 6 15 60.0% 10 10 20 50.0%
26 1973 3 3 6 50.0% 2 4 6 33.3% 2 5 7 28.6% 0 1 1 0.0% 1983 14 4 18 77.8% 7 8 15 46.7% 8 5 13 61.5% 4 9 13 30.8%
27 1974 8 4 12 66.7% 5 4 9 55.6% 10 6 16 62.5% 7 5 12 58.3% 1984 12 7 19 63.2% 7 8 15 46.7% 8 6 14 57.1% 2 7 9 22.2%
28 1975 0 3 3 0.0% 3 2 5 60.0% 2 4 6 33.3% 3 5 8 37.5% 1985 5 8 13 38.5% 1 4 5 20.0% 1 3 4 25.0% 1 6 7 14.3%
29 1976 — — — — 2 2 4 50.0% 5 3 8 62.5% 0 2 2 0.0% 1986 1 2 3 33.3% 4 6 10 40.0% 1 3 4 25.0% — — — —
30 1977 2 3 5 40.0% 4 8 12 33.3% 16 6 22 72.7% 0 1 1 0.0% 1987 1 1 2 50.0% 0 2 2 0.0% — — — — — — — —
31 1978 — — — — 3 1 4 75.0% 1 2 3 33.3% — — — — 1988 0 1 1 0.0% — — — — — — — — — — — —
33 1980 — — — — — — — — 4 4 8 50.0% — — — — — — — — — — — — — — — — — — — — —
Career — 43 29 72 59.7% 112 63 175 64.0% 118 80 198 59.6% 19 27 46 41.3% — 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 Helen Gourlay 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 — — — — +44 — — 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 +2.43
19 — — — — — — — — — — — — — — — — 1976 1607 119.9 — — — — -10 +40 — 48.8% +0.09 2–5 (29%) 1–3 (25%) — +0.96
20 — — — — — — — — — — — — — — — — 1977 1765 138.0 — — — — -79 -79 -75 58.1% +0.41 3–3 (50%) 6–5 (55%) 102.4 +0.27
21 1968 1678 124.8 — — — — — +138 -25 66.7% +1.23 12–8 (60%) — — +0.47 1978 1791 135.3 — — — — +3 -132 -30 52.6% +0.33 8–6 (57%) 2–6 (25%) 99.2 +2.99
22 1969 1730 129.9 — — — — -101 +74 0 57.0% +0.54 10–10 (50%) — — -2.37 1979 1780 155.2 — — — — -44 -74 +25 40.5% -0.50 4–4 (50%) 1–2 (33%) 99.0 -4.03
23 1970 1845 137.5 — — — — -65 -20 +20 61.9% +0.90 12–7 (63%) 2–1 (67%) 105.2 -3.63 1980 1742 138.8 — — — — -89 +32 +50 52.5% +0.26 2–4 (33%) 4–3 (57%) 99.5 -4.96
24 1971 1908 139.3 — — — — -97 +13 +18 59.3% +0.48 16–4 (80%) 6–4 (60%) 110.6 -3.93 1981 1720 143.5 — — — — -64 +96 — 43.1% -0.39 4–6 (40%) 1–5 (17%) 96.9 -2.78
25 1972 1799 145.3 — — — — -6 +158 +32 57.0% +0.73 7–5 (58%) 1–5 (17%) 97.7 -4.23 1982 1820 142.9 — — — — -77 +69 -9 55.2% +0.06 11–10 (52%) 9–10 (47%) 99.8 -3.53
26 1973 1745 133.2 — — — — +25 +125 +41 34.9% -1.00 2–3 (40%) 0–2 — -2.97 1983 1755 138.0 — — — — +7 +104 +97 55.4% +0.20 10–11 (48%) 7–3 (70%) 100.0 +1.14
27 1974 1943 155.6 — — — — +1 -37 -73 58.2% +0.69 10–6 (63%) 2–2 (50%) 103.5 -7.00 1984 1801 134.8 — — — — -65 -14 +95 53.1% +0.15 5–11 (31%) 7–8 (47%) 94.0 -0.64
28 1975 1841 138.9 — — — — +23 +75 -47 42.3% -0.52 2–6 (25%) 0–3 (0%) — -2.67 1985 1605 125.4 — — — — +10 +114 +210 37.7% -0.97 1–10 (9%) 0–1 — -0.99
29 1976 1815 132.4 — — — — — +77 +28 50.0% +0.16 2–2 (50%) 1–1 — -0.42 1986 1565 105.1 — — — — +19 +86 +196 36.8% -0.87 2–2 (50%) 0–1 — 0.00
30 1977 1898 153.8 — — — — -104 -101 +103 57.3% +0.74 3–7 (30%) 0–2 — -2.97 1987 1558 108.1 — — — — — — — 25.0% -2.38 — — — -0.56
31 1978 1883 117.6 — — — — — -72 +76 50.0% -0.37 2–0 1–0 — -0.80 1988 1542 94.0 — — — — — — — 0.0% -4.00 — — — +0.11
33 1980 1797 99.2 — — — — — — +40 42.1% +0.47 3–2 (60%) 0–5 (0%) 94.9 +0.81 — — — — — — — — — — — — — — — —
Career — 1962 144.2 — — — — -37 +58 +16 57.4% +0.59 81–60 (57%) 13–25 (34%) 97.0 -6.03 — 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.