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

Yvonne Vermaak vs Fiorella Bonicelli H2H: 0-2

Fiorella Bonicelli holds a 2–0 lead over Yvonne Vermaak in their WTA head-to-head. Across 2 main-draw meetings, Fiorella Bonicelli leads 2–0 on grass. Most recently, Fiorella Bonicelli won the 1977 Chichester round of 16 6-3 7-6.

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Yvonne Vermaak
RSA Age 69 Right-Handed 155 cm / 5'1"
H2H
0 – 2
2 main-draw meetings
Fiorella Bonicelli
URU Age 74

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Fiorella Bonicelli 6-3 7-6 Yvonne Vermaak Match data Jun 10, 1977* R16 Chichester WTA 250 Grass
Fiorella Bonicelli 4-6 6-2 6-0 Yvonne Vermaak Match data Jun 25, 1975* R128 Wimbledon Grand Slam Grass

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
Fiorella Bonicelli — — — 1,868 137 98 58.3% 0 0 0 0 12 12

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 Fiorella Bonicelli
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 1973 0–2 0.0% — 1,495 0 0 1968 1–2 33.3% — 1,509 0 0
17 1974 1–2 33.3% — 1,489 0 0 1969 11–8 57.9% — 1,604 0 0
18 1975 15–12 55.6% — 1,599 0 0 1970 11–5 68.8% — 1,702 0 2
19 1976 8–10 44.4% — 1,606 0 1 1971 12–10 54.5% — 1,701 0 6
20 1977 20–14 58.8% — 1,765 0 2 1972 26–16 61.9% — 1,796 0 9
21 1978 29–23 55.8% — 1,791 0 2 1973 24–11 68.6% — 1,842 0 11
22 1979 15–23 39.5% — 1,779 0 2 1974 6–4 60.0% — 1,800 0 11
23 1980 19–18 51.4% — 1,741 0 2 1975 12–13 48.0% — 1,774 0 12
24 1981 19–28 40.4% — 1,719 0 2 1976 14–8 63.6% — 1,776 0 12
25 1982 36–27 57.1% — 1,820 0 2 1977 9–10 47.4% — 1,763 0 12
26 1983 33–26 55.9% — 1,754 0 4 1978 10–9 52.6% — 1,742 0 12
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 1982 0–1 0.0% — 1,728 0 12
31 1988 0–1 0.0% #287 1,541 0 5 — — — — — — —
32 — — — — — — — 1984 1–1 50.0% — 1,717 0 12

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 Fiorella Bonicelli
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% — — — — — — — — — — — — 1968 — — — — 1 2 3 33.3% — — — — — — — —
17 1974 1 2 3 33.3% — — — — — — — — — — — — 1969 — — — — 8 4 12 66.7% 3 4 7 42.9% — — — —
18 1975 4 3 7 57.1% 7 4 11 63.6% 3 4 7 42.9% — — — — 1970 — — — — 10 3 13 76.9% 1 2 3 33.3% — — — —
19 1976 1 1 2 50.0% 7 6 13 53.8% 0 2 2 0.0% 0 1 1 0.0% 1971 — — — — 10 7 17 58.8% 1 3 4 25.0% — — — —
20 1977 3 2 5 60.0% 6 7 13 46.2% 8 2 10 80.0% 3 3 6 50.0% 1972 0 1 1 0.0% 15 9 24 62.5% 8 6 14 57.1% — — — —
21 1978 13 7 20 65.0% 2 2 4 50.0% 8 4 12 66.7% 6 10 16 37.5% 1973 — — — — 19 8 27 70.4% 5 3 8 62.5% — — — —
22 1979 4 6 10 40.0% 4 4 8 50.0% 5 4 9 55.6% 2 9 11 18.2% 1974 — — — — 4 3 7 57.1% 2 1 3 66.7% — — — —
23 1980 2 5 7 28.6% 9 5 14 64.3% 4 4 8 50.0% 4 4 8 50.0% 1975 2 2 4 50.0% 9 9 18 50.0% 1 2 3 33.3% — — — —
24 1981 7 9 16 43.8% 11 9 20 55.0% 0 1 1 0.0% 1 9 10 10.0% 1976 — — — — 14 7 21 66.7% 0 1 1 0.0% — — — —
25 1982 4 4 8 50.0% 13 7 20 65.0% 9 6 15 60.0% 10 10 20 50.0% 1977 1 1 2 50.0% 6 8 14 42.9% 2 1 3 66.7% — — — —
26 1983 14 4 18 77.8% 7 8 15 46.7% 8 5 13 61.5% 4 9 13 30.8% 1978 — — — — 6 5 11 54.5% 0 3 3 0.0% — — — —
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% — — — — — — — — 1982 — — — — 0 1 1 0.0% — — — — — — — —
31 1988 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
32 — — — — — — — — — — — — — — — — — 1984 — — — — 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% — 3 4 7 42.9% 103 67 170 60.6% 23 26 49 46.9% — — — —

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 Fiorella Bonicelli
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 1968 1510 98.3 — — — — — — — 40.0% -0.60 1–0 — — -0.19
17 1974 1489 99.2 — — — — +44 — — 42.9% -0.71 0–1 — — +0.69 1969 1604 117.2 — — — — — +35 -68 61.0% +0.41 0–3 (0%) — — -0.11
18 1975 1599 120.1 — — — — +53 -2 -47 57.1% +0.46 3–6 (33%) 3–0 (100%) 100.2 +2.43 1970 1702 116.4 — — — — — +53 -159 61.8% +0.44 3–1 (75%) — — +1.28
19 1976 1607 119.9 — — — — -10 +40 — 48.8% +0.09 2–5 (29%) 1–3 (25%) — +0.96 1971 1702 122.1 — — — — — +58 -185 54.9% +0.33 3–4 (43%) — — +2.08
20 1977 1765 138.0 — — — — -79 -79 -75 58.1% +0.41 3–3 (50%) 6–5 (55%) 102.4 +0.27 1972 1796 137.0 — — — — — +57 -166 58.0% +0.53 10–6 (63%) 4–2 (67%) 105.5 -0.59
21 1978 1791 135.3 — — — — +3 -132 -30 52.6% +0.33 8–6 (57%) 2–6 (25%) 99.2 +2.99 1973 1842 136.2 — — — — — +53 -147 63.0% +0.73 8–3 (73%) 6–4 (60%) 103.3 +0.33
22 1979 1780 155.2 — — — — -44 -74 +25 40.5% -0.50 4–4 (50%) 1–2 (33%) 99.0 -4.03 1974 1800 119.7 — — — — — +33 -78 66.7% +1.33 1–2 (33%) — — +0.49
23 1980 1742 138.8 — — — — -89 +32 +50 52.5% +0.26 2–4 (33%) 4–3 (57%) 99.5 -4.96 1975 1774 138.4 — — — — -137 +22 -84 51.7% +0.29 6–6 (50%) 1–3 (25%) 98.0 -2.39
24 1981 1720 143.5 — — — — -64 +96 — 43.1% -0.39 4–6 (40%) 1–5 (17%) 96.9 -2.78 1976 1777 132.4 — — — — — +29 — 59.2% +0.84 4–1 (80%) 2–1 (67%) 103.9 -0.37
25 1982 1820 142.9 — — — — -77 +69 -9 55.2% +0.06 11–10 (52%) 9–10 (47%) 99.8 -3.53 1977 1763 128.8 — — — — — +1 -63 50.0% -0.02 2–4 (33%) 3–2 (60%) 98.6 -0.83
26 1983 1755 138.0 — — — — +7 +104 +97 55.4% +0.20 10–11 (48%) 7–3 (70%) 100.0 +1.14 1978 1743 134.2 — — — — — +42 -82 55.8% +0.28 1–4 (20%) 2–2 (50%) 97.2 -1.32
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 1982 1728 102.7 — — — — — — — 0.0% -3.00 — — — -0.22
31 1988 1542 94.0 — — — — — — — 0.0% -4.00 — — — +0.11 — — — — — — — — — — — — — — — —
32 — — — — — — — — — — — — — — — — 1984 1717 101.4 — — — — — — — 50.0% +0.67 1–1 — — +0.28
Career — 1892 141.9 — — — — -33 +33 +34 50.0% -0.05 55–80 (41%) 41–47 (47%) 93.1 -1.91 — 1868 138.2 — — — — -137 +40 -127 57.4% +0.47 40–35 (53%) 18–14 (56%) 102.7 -0.67

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.