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

Yvonne Vermaak vs Kathy May H2H: 1-0

Yvonne Vermaak holds a 1–0 lead over Kathy May in their WTA head-to-head. Across 1 main-draw meeting, Yvonne Vermaak leads 1–0 on hard courts. Most recently, Yvonne Vermaak won the 1978 Mahwah round of 32 6-1 7-5.

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

Yvonne Vermaak
RSA Age 69 Right-Handed 155 cm / 5'1"
H2H
1 – 0
1 main-draw meetings
Kathy May
USA Age 70 Right-Handed 173 cm / 5'8"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Yvonne Vermaak 6-1 7-5 Kathy May Match data Aug 24, 1978* R32 Mahwah 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
Yvonne Vermaak #558 #38 10 1,892 239 249 49.0% 0 0 0 0 5 5
Kathy May — — — 1,908 111 89 55.5% 0 0 0 0 6 6

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 Yvonne Vermaak Kathy May
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
15 — — — — — — — 1971 0–1 0.0% — 1,497 0 0
16 1973 0–2 0.0% — 1,495 0 0 1972 4–2 66.7% — 1,536 0 0
17 1974 1–2 33.3% — 1,489 0 0 1973 6–1 85.7% — 1,626 0 1
18 1975 15–12 55.6% — 1,599 0 0 1974 16–5 76.2% — 1,713 0 4
19 1976 8–10 44.4% — 1,606 0 1 1975 14–13 51.9% — 1,748 0 5
20 1977 20–14 58.8% — 1,765 0 2 1976 15–13 53.6% — 1,812 0 6
21 1978 29–23 55.8% — 1,791 0 2 1977 14–16 46.7% — 1,802 0 6
22 1979 15–23 39.5% — 1,779 0 2 1978 21–16 56.8% — 1,829 0 6
23 1980 19–18 51.4% — 1,741 0 2 1979 15–12 55.6% — 1,829 0 6
24 1981 19–28 40.4% — 1,719 0 2 1980 4–8 33.3% — 1,731 0 6
25 1982 36–27 57.1% — 1,820 0 2 1981 1–1 50.0% — 1,713 0 6
26 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 — — — — — — —
34 — — — — — — — 1990 1–1 50.0% — 1,705 0 6

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 Yvonne Vermaak Kathy May
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 %
15 — — — — — — — — — — — — — — — — — 1971 0 1 1 0.0% — — — — — — — — — — — —
16 1973 0 2 2 0.0% — — — — — — — — — — — — 1972 4 2 6 66.7% — — — — — — — — — — — —
17 1974 1 2 3 33.3% — — — — — — — — — — — — 1973 5 0 5 100.0% — — — — 1 1 2 50.0% — — — —
18 1975 4 3 7 57.1% 7 4 11 63.6% 3 4 7 42.9% — — — — 1974 7 0 7 100.0% 0 1 1 0.0% 8 3 11 72.7% 1 1 2 50.0%
19 1976 1 1 2 50.0% 7 6 13 53.8% 0 2 2 0.0% 0 1 1 0.0% 1975 0 1 1 0.0% 4 7 11 36.4% 3 2 5 60.0% 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% 1976 1 1 2 50.0% 11 6 17 64.7% 0 2 2 0.0% 3 4 7 42.9%
21 1978 13 7 20 65.0% 2 2 4 50.0% 8 4 12 66.7% 6 10 16 37.5% 1977 1 2 3 33.3% 7 7 14 50.0% 3 3 6 50.0% 3 4 7 42.9%
22 1979 4 6 10 40.0% 4 4 8 50.0% 5 4 9 55.6% 2 9 11 18.2% 1978 5 5 10 50.0% 6 5 11 54.5% 2 1 3 66.7% 8 5 13 61.5%
23 1980 2 5 7 28.6% 9 5 14 64.3% 4 4 8 50.0% 4 4 8 50.0% 1979 6 4 10 60.0% 1 1 2 50.0% 2 3 5 40.0% 6 4 10 60.0%
24 1981 7 9 16 43.8% 11 9 20 55.0% 0 1 1 0.0% 1 9 10 10.0% 1980 1 2 3 33.3% — — — — 1 2 3 33.3% 0 3 3 0.0%
25 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% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
34 — — — — — — — — — — — — — — — — — 1990 1 1 2 50.0% — — — — — — — — — — — —
Career — 72 64 136 52.9% 78 72 150 52.0% 55 44 99 55.6% 33 68 101 32.7% — 31 19 50 62.0% 29 27 56 51.8% 20 17 37 54.1% 21 22 43 48.8%

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 Yvonne Vermaak Kathy May
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
15 — — — — — — — — — — — — — — — — 1971 1497 102.9 — — — — — — — 33.3% -1.00 0–1 — — -0.25
16 1973 1496 101.8 — — — — — — — 20.0% -3.20 0–1 — — -0.39 1972 1537 105.3 — — — — +66 — — 57.1% +0.71 2–0 — — +1.22
17 1974 1489 99.2 — — — — +44 — — 42.9% -0.71 0–1 — — +0.69 1973 1626 119.7 — — — — +97 — — 76.5% +2.24 2–1 (67%) 1–1 — +1.52
18 1975 1599 120.1 — — — — +53 -2 -47 57.1% +0.46 3–6 (33%) 3–0 (100%) 100.2 +2.43 1974 1713 120.9 — — — — +112 — -31 70.8% +1.44 4–2 (67%) 2–1 (67%) 103.0 +4.53
19 1976 1607 119.9 — — — — -10 +40 — 48.8% +0.09 2–5 (29%) 1–3 (25%) — +0.96 1975 1749 141.0 — — — — — -194 -46 53.3% +0.27 2–4 (33%) 4–3 (57%) 98.8 -2.15
20 1977 1765 138.0 — — — — -79 -79 -75 58.1% +0.41 3–3 (50%) 6–5 (55%) 102.4 +0.27 1976 1812 121.0 — — — — -28 -89 — 48.4% -0.44 8–2 (80%) 5–0 (100%) 111.1 -1.24
21 1978 1791 135.3 — — — — +3 -132 -30 52.6% +0.33 8–6 (57%) 2–6 (25%) 99.2 +2.99 1977 1803 147.7 — — — — +22 -55 -100 54.0% -0.14 1–6 (14%) 5–1 (83%) 97.8 -3.29
22 1979 1780 155.2 — — — — -44 -74 +25 40.5% -0.50 4–4 (50%) 1–2 (33%) 99.0 -4.03 1978 1830 146.4 — — — — +43 -105 -94 58.5% +0.80 4–6 (40%) 2–4 (33%) 97.7 -1.49
23 1980 1742 138.8 — — — — -89 +32 +50 52.5% +0.26 2–4 (33%) 4–3 (57%) 99.5 -4.96 1979 1830 136.1 — — — — +67 — -99 50.0% -0.12 6–2 (75%) 3–1 (75%) 104.8 +0.55
24 1981 1720 143.5 — — — — -64 +96 — 43.1% -0.39 4–6 (40%) 1–5 (17%) 96.9 -2.78 1980 1731 114.5 — — — — +40 — -26 39.3% -0.71 1–3 (25%) 1–0 — -0.13
25 1982 1820 142.9 — — — — -77 +69 -9 55.2% +0.06 11–10 (52%) 9–10 (47%) 99.8 -3.53 1981 1713 106.4 — — — — — — — 60.0% +2.00 0–1 0–1 — +0.05
26 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 — — — — — — — — — — — — — — — —
34 — — — — — — — — — — — — — — — — 1990 1705 99.6 — — — — — — — 40.0% -0.40 1–0 0–1 — +0.11
Career — 1892 141.9 — — — — -33 +33 +34 50.0% -0.05 55–80 (41%) 41–47 (47%) 93.1 -1.91 — 1909 141.8 — — — — +50 -105 -61 55.0% +0.31 31–28 (53%) 23–13 (64%) 107.6 -0.29

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.