H2H data updated: 2026-09-08 00:00 UTC

Sandy Collins vs Marianne Werdel Witmeyer H2H: 0-2

Marianne Werdel Witmeyer holds a 2–0 lead over Sandy Collins in their WTA head-to-head. Across 2 main-draw meetings, Marianne Werdel Witmeyer leads 2–0 on hard courts. Most recently, Marianne Werdel Witmeyer won the 1994 San Diego round of 64 4-6 6-4 6-2.

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Sandy Collins
USA Age 67
H2H
0 – 2
2 main-draw meetings
Marianne Werdel Witmeyer
USA

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Marianne Werdel Witmeyer 4-6 6-4 6-2 Sandy Collins Match data Aug 3, 1994* R64 San Diego Tier II → modern equivalent WTA 500 Hard
Marianne Werdel Witmeyer 6-3 6-1 Sandy Collins Match data Sep 29, 1992* R16 Taipei Tier V → modern equivalent 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
Sandy Collins — — — 1,823 89 151 37.1% 0 0 0 0 0 0
Marianne Werdel Witmeyer — — — 1,850 181 203 47.1% 0 0 0 0 1 1

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.

Sandy Collins Marianne Werdel Witmeyer
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
1973 1–1 50.0% — 1,497 0 0 1983 0–1 0.0% — 1,492 0 0
1978 6–6 50.0% — 1,536 0 0 1984 0–1 0.0% — 1,477 0 0
1979 2–7 22.2% — 1,495 0 0 1985 6–3 66.7% — 1,541 0 1
1980 10–12 45.5% — 1,630 0 0 1986 13–10 56.5% — 1,683 0 1
1981 25–20 55.6% — 1,785 0 0 1987 10–17 37.0% — 1,659 0 1
1982 14–21 40.0% — 1,733 0 0 1988 11–20 35.5% — 1,586 0 1
1983 13–20 39.4% — 1,684 0 0 1989 13–17 43.3% — 1,592 0 1
1984 9–18 33.3% — 1,599 0 0 1990 18–18 50.0% — 1,745 0 1
1985 1–9 10.0% — 1,507 0 0 1991 21–19 52.5% — 1,739 0 1
1986 0–1 0.0% — 1,499 0 0 1992 13–17 43.3% — 1,697 0 1
1987 0–4 0.0% — 1,453 0 0 1993 21–18 53.8% — 1,748 0 1
1988 3–5 37.5% — 1,490 0 0 1994 22–22 50.0% — 1,773 0 1
1989 2–8 20.0% — 1,472 0 0 1995 20–18 52.6% — 1,787 0 1
1990 1–9 10.0% — 1,421 0 0 1996 8–18 30.8% — 1,665 0 1
1991 1–5 16.7% — 1,405 0 0 1997 5–4 55.6% — 1,673 0 1
1992 1–2 33.3% — 1,412 0 0 — — — — — — —
1993 0–1 0.0% — 1,407 0 0 — — — — — — —
1994 0–2 0.0% — 1,393 0 0 — — — — — — —

Surface Results by Career Season

Rows are aligned in career order because complete birth data is unavailable. 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.

Sandy Collins Marianne Werdel Witmeyer
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 %
1973 1 1 2 50.0% — — — — — — — — — — — — 1983 — — — — 0 1 1 0.0% — — — — — — — —
1978 2 2 4 50.0% 0 1 1 0.0% 0 1 1 0.0% — — — — 1984 — — — — — — — — — — — — 0 1 1 0.0%
1979 0 1 1 0.0% 1 4 5 20.0% 1 1 2 50.0% 0 1 1 0.0% 1985 1 2 3 33.3% — — — — — — — — — — — —
1980 4 6 10 40.0% 1 1 2 50.0% 0 1 1 0.0% 5 4 9 55.6% 1986 10 8 18 55.6% — — — — — — — — 3 2 5 60.0%
1981 4 5 9 44.4% 11 6 17 64.7% 3 2 5 60.0% 7 7 14 50.0% 1987 2 6 8 25.0% 0 2 2 0.0% 2 4 6 33.3% 6 5 11 54.5%
1982 3 2 5 60.0% 4 5 9 44.4% 0 2 2 0.0% 7 12 19 36.8% 1988 9 16 25 36.0% — — — — 1 3 4 25.0% 1 1 2 50.0%
1983 5 6 11 45.5% 2 6 8 25.0% 2 3 5 40.0% 4 5 9 44.4% 1989 11 14 25 44.0% 1 1 2 50.0% — — — — 1 2 3 33.3%
1984 7 6 13 53.8% 0 3 3 0.0% 0 6 6 0.0% 2 3 5 40.0% 1990 14 12 26 53.8% 1 2 3 33.3% 0 1 1 0.0% 3 3 6 50.0%
1985 1 5 6 16.7% 0 1 1 0.0% 0 2 2 0.0% 0 1 1 0.0% 1991 16 11 27 59.3% 1 2 3 33.3% 2 2 4 50.0% 2 4 6 33.3%
1986 — — — — — — — — 0 1 1 0.0% — — — — 1992 11 12 23 47.8% 0 2 2 0.0% 1 2 3 33.3% 1 1 2 50.0%
1987 0 2 2 0.0% — — — — 0 2 2 0.0% — — — — 1993 14 10 24 58.3% 1 2 3 33.3% 2 2 4 50.0% 4 4 8 50.0%
1988 3 4 7 42.9% — — — — 0 1 1 0.0% — — — — 1994 15 13 28 53.6% 1 2 3 33.3% 2 2 4 50.0% 4 5 9 44.4%
1989 1 5 6 16.7% — — — — 0 1 1 0.0% 1 2 3 33.3% 1995 14 11 25 56.0% 1 3 4 25.0% 1 2 3 33.3% 4 2 6 66.7%
1990 0 5 5 0.0% 1 3 4 25.0% — — — — 0 1 1 0.0% 1996 3 10 13 23.1% 1 3 4 25.0% 0 2 2 0.0% 4 3 7 57.1%
1991 1 2 3 33.3% 0 1 1 0.0% 0 1 1 0.0% 0 1 1 0.0% 1997 5 4 9 55.6% — — — — — — — — — — — —
1992 1 1 2 50.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
1993 — — — — — — — — — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
1994 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career 33 55 88 37.5% 20 32 52 38.5% 6 24 30 20.0% 26 38 64 40.6% Career 125 129 254 49.2% 7 20 27 25.9% 11 20 31 35.5% 33 33 66 50.0%

Advanced Statistics Comparison by Career Season

Rows are aligned in career order because complete birth data is unavailable. 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.

Sandy Collins Marianne Werdel Witmeyer
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
1973 1497 99.4 — — — — — — — 50.0% 0.00 — — — +0.62 1983 1492 100.4 — — — — — — — 0.0% -2.50 — 0–1 — -0.02
1978 1537 117.1 — — — — +89 — — 57.1% +0.64 0–4 (0%) — — +0.85 1984 1478 96.1 — — — — — — — 0.0% -4.00 — — — +0.29
1979 1495 107.9 — — — — — -5 — 30.0% -0.55 0–2 0–1 — +1.38 1985 1542 112.3 — — — — +15 — — 63.2% +0.89 1–0 0–1 — +0.37
1980 1631 128.8 — — — — +4 — — 48.9% +0.22 3–2 (60%) 1–2 (33%) 101.6 +0.03 1986 1683 123.1 — — — — +21 — — 50.0% -0.34 8–2 (80%) 5–1 (83%) — +1.30
1981 1786 137.9 — — — — -48 -81 -187 52.6% -0.04 6–3 (67%) 5–4 (56%) 104.5 -1.75 1987 1659 129.2 — — — — +44 — -85 41.9% -0.77 2–6 (25%) 3–0 (100%) — -0.83
1982 1733 126.3 — — — — -17 -43 — 38.7% -0.91 6–3 (67%) 2–4 (33%) 103.2 -0.59 1988 1587 119.6 — — — — +2 — -37 37.3% -1.03 2–3 (40%) 3–2 (60%) 100.4 -1.05
1983 1684 124.1 — — — — +35 -29 -111 40.8% -0.63 2–3 (40%) 1–5 (17%) 95.5 -0.13 1989 1592 119.9 — — — — -6 — — 44.1% -0.25 4–4 (50%) 3–4 (43%) 99.6 +2.41
1984 1600 117.7 — — — — +113 -7 -91 34.4% -0.97 4–5 (44%) 1–2 (33%) 98.9 -0.20 1990 1746 136.3 — — — — +8 -257 — 51.7% +0.10 7–10 (41%) 6–4 (60%) 103.1 -0.70
1985 1508 99.2 — — — — +101 — — 18.2% -2.36 0–2 1–0 — +0.70 1991 1740 132.5 — — — — +15 -243 -169 48.9% -0.13 10–4 (71%) 5–4 (56%) 103.3 +0.98
1986 1500 101.5 — — — — — — — 33.3% -2.33 0–1 — — -0.02 1992 1697 133.3 — — — — +32 — -146 48.5% 0.00 3–7 (30%) 4–1 (80%) 98.1 +0.32
1987 1453 94.2 — — — — — — — 11.1% -2.56 0–1 — — +0.23 1993 1749 139.9 — — — — +28 -270 -150 51.6% +0.31 8–5 (62%) 2–2 (50%) 101.6 -0.37
1988 1491 114.4 — — — — +84 — — 42.1% -0.63 1–2 (33%) 1–3 (25%) 97.4 -0.02 1994 1773 143.7 — — — — +15 -260 -181 48.5% -0.08 9–6 (60%) 3–2 (60%) — -0.29
1989 1473 103.4 — — — — +55 — — 23.8% -1.71 0–1 2–0 — +0.37 1995 1788 149.0 — — — — +45 -292 — 54.1% +0.31 5–6 (45%) 3–2 (60%) 101.2 +0.06
1990 1421 95.6 — — — — +39 +113 — 17.4% -2.65 1–2 (33%) — — +0.17 1996 1666 124.9 — — — — +54 -192 — 31.6% -1.28 3–2 (60%) 2–0 — +0.43
1991 1406 104.6 — — — — +39 — — 21.4% -2.00 1–1 0–1 — +0.16 1997 1673 119.1 — — — — +35 — — 52.6% +0.37 1–2 (33%) 0–1 — -0.07
1992 1413 104.4 — — — — — — — 33.3% -0.83 — 0–1 — +0.18 — — — — — — — — — — — — — — — —
1993 1407 95.8 — — — — — — — 0.0% -5.00 — — — -0.07 — — — — — — — — — — — — — — — —
1994 1393 103.0 — — — — — — — 33.3% -1.33 0–2 1–1 — -0.05 — — — — — — — — — — — — — — — —
Career 1823 125.8 — — — — +27 -35 -127 39.2% -0.76 24–34 (41%) 15–24 (38%) 92.7 +0.78 Career 1850 139.7 — — — — +22 -251 -124 47.3% -0.20 63–57 (53%) 39–25 (61%) 108.6 +0.74

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.