H2H data updated: 2026-08-31 00:00 UTC

Ada Bakker vs Stephanie Defina H2H: 0-1

Stephanie Defina holds a 1–0 lead over Ada Bakker in their WTA head-to-head. Across 1 main-draw meeting, Stephanie Defina leads 1–0 on clay. Most recently, Stephanie Defina won the 1970 St. Petersburg round of 16 7-5 6-3.

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

Ada Bakker
NED Age 78
H2H
0 – 1
1 main draw meetings
Stephanie Defina
USA Age 80

H2H Match Log

WinnerScoreLoserMatch DataDateRoundTournamentCategorySurface
Stephanie Defina 7-5 6-3 Ada Bakker Match data Apr 10, 1970* R16 St. Petersburg WTA 500 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
Ada Bakker — — — 1,537 18 36 33.3% 0 0 0 0 1 1
Stephanie Defina — — — 1,818 93 62 60.0% 0 1 0 0 6 7

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 Ada Bakker Stephanie Defina
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
20 1968 3–8 27.3% — 1,479 0 0 — — — — — — —
21 1969 8–11 42.1% — 1,513 0 1 — — — — — — —
22 1970 4–10 28.6% — 1,485 0 1 1968 33–22 60.0% — 1,678 0 1
23 1971 3–5 37.5% — 1,507 0 1 1969 25–9 73.5% — 1,760 0 5
24 1972 0–2 0.0% — 1,481 0 1 1970 33–17 66.0% — 1,788 0 7
25 — — — — — — — 1971 1–9 10.0% — 1,706 0 7
26 — — — — — — — 1972 1–2 33.3% — 1,713 0 7
27 — — — — — — — 1973 0–2 0.0% — 1,685 0 7
28 — — — — — — — 1974 0–1 0.0% — 1,674 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 Ada Bakker Stephanie Defina
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 %
20 1968 — — — — 1 2 3 33.3% 2 6 8 25.0% — — — — — — — — — — — — — — — — — — — — —
21 1969 — — — — 4 3 7 57.1% 3 5 8 37.5% 1 3 4 25.0% — — — — — — — — — — — — — — — — —
22 1970 0 1 1 0.0% 2 5 7 28.6% 2 3 5 40.0% — — — — 1968 4 6 10 40.0% 20 7 27 74.1% 7 7 14 50.0% 2 2 4 50.0%
23 1971 — — — — 1 1 2 50.0% 2 4 6 33.3% — — — — 1969 1 1 2 50.0% 17 5 22 77.3% — — — — 6 2 8 75.0%
24 1972 — — — — 0 1 1 0.0% 0 1 1 0.0% — — — — 1970 4 3 7 57.1% 26 9 35 74.3% 1 2 3 33.3% 2 2 4 50.0%
25 — — — — — — — — — — — — — — — — — 1971 — — — — 0 2 2 0.0% 0 1 1 0.0% 1 6 7 14.3%
26 — — — — — — — — — — — — — — — — — 1972 1 1 2 50.0% 0 1 1 0.0% — — — — — — — —
27 — — — — — — — — — — — — — — — — — 1973 0 1 1 0.0% — — — — 0 1 1 0.0% — — — —
28 — — — — — — — — — — — — — — — — — 1974 — — — — — — — — — — — — 0 1 1 0.0%
Career — 0 1 1 0.0% 8 12 20 40.0% 9 19 28 32.1% 1 3 4 25.0% — 10 12 22 45.5% 63 24 87 72.4% 8 11 19 42.1% 11 13 24 45.8%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. 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 Ada Bakker Stephanie Defina
Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak Schedule Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak Schedule
20 1968 1479 99.9 — — — — — +14 +6 28.6% -1.38 1–0 — -0.30 — — — — — — — — — — — — — — —
21 1969 1513 112.5 — — — — -23 +17 -20 42.9% +0.19 2–2 (50%) — +1.17 — — — — — — — — — — — — — — —
22 1970 1485 107.3 — — — — — +5 +4 27.6% -1.48 1–2 (33%) — -0.09 1968 1678 117.2 — — — — -196 +95 -126 56.8% +0.45 13–9 (59%) — -1.42
23 1971 1507 107.9 — — — — — — -10 36.8% -0.84 2–1 (67%) 1–0 +0.42 1969 1761 138.3 — — — — -91 +61 — 71.6% +1.86 3–3 (50%) — -0.02
24 1972 1482 96.9 — — — — — — — 20.0% -2.80 0–1 — +0.33 1970 1789 133.4 — — — — -88 +98 -231 62.9% +1.05 7–4 (64%) 1–0 +0.43
25 — — — — — — — — — — — — — — — 1971 1707 111.7 — — — — -58 — — 10.0% -2.90 — — -0.85
26 — — — — — — — — — — — — — — — 1972 1714 107.0 — — — — — — — 33.3% -1.83 — 1–0 -0.94
27 — — — — — — — — — — — — — — — 1973 1686 100.5 — — — — — — — 0.0% -3.50 — — -0.42
28 — — — — — — — — — — — — — — — 1974 1675 102.4 — — — — — — — 0.0% -1.50 — 0–1 -0.06
Career — 1538 108.8 — — — — -23 +12 -6 34.5% -0.81 6–6 (50%) 1–0 +2.94 — 1819 129.6 — — — — -120 +87 -145 57.7% +0.65 23–16 (59%) 2–1 (67%) -2.14

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.