H2H data updated: 2026-09-12 00:00 UTC

Sandy Collins vs Claudia Porwik H2H: 0-1

Claudia Porwik holds a 1–0 lead over Sandy Collins in their WTA head-to-head. Across 1 main-draw meeting, Claudia Porwik leads 1–0 on hard courts. Most recently, Claudia Porwik won the 1989 Australian Open round of 128 6-3 6-7(3) 6-2.

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Sandy Collins
USA Age 67
H2H
0 – 1
1 main-draw meetings
Claudia Porwik
GER Age 57

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Claudia Porwik #77 6-3 6-7(3) 6-2 Sandy Collins Match data Jan 18, 1989* R128 Australian Open Grand Slam 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
Claudia Porwik #579 #29 148 1,786 114 146 43.8% 0 0 0 0 0 0

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 Sandy Collins Claudia Porwik
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
14 1973 1–1 50.0% — 1,497 0 0 — — — — — — —
17 — — — — — — — 1986 6–5 54.5% #96 1,577 0 0
18 — — — — — — — 1987 13–19 40.6% #104 1,581 0 0
19 1978 6–6 50.0% — 1,536 0 0 1988 11–16 40.7% #68 1,571 0 0
20 1979 2–7 22.2% — 1,495 0 0 1989 19–18 51.4% #75 1,660 0 0
21 1980 10–12 45.5% — 1,630 0 0 1990 18–17 51.4% #29 1,667 0 0
22 1981 25–20 55.6% — 1,785 0 0 1991 14–20 41.2% #80 1,644 0 0
23 1982 14–21 40.0% — 1,733 0 0 1992 12–18 40.0% #98 1,605 0 0
24 1983 13–20 39.4% — 1,684 0 0 1993 13–20 39.4% #92 1,601 0 0
25 1984 9–18 33.3% — 1,599 0 0 1994 0–1 0.0% #256 1,585 0 0
26 1985 1–9 10.0% — 1,507 0 0 1995 4–7 36.4% #133 1,551 0 0
27 1986 0–1 0.0% — 1,499 0 0 1996 4–5 44.4% #153 1,563 0 0
28 1987 0–4 0.0% — 1,453 0 0 — — — — — — —
29 1988 3–5 37.5% — 1,490 0 0 — — — — — — —
30 1989 2–8 20.0% — 1,472 0 0 — — — — — — —
31 1990 1–9 10.0% — 1,421 0 0 — — — — — — —
32 1991 1–5 16.7% — 1,405 0 0 — — — — — — —
33 1992 1–2 33.3% — 1,412 0 0 — — — — — — —
34 1993 0–1 0.0% — 1,407 0 0 — — — — — — —
35 1994 0–2 0.0% — 1,393 0 0 — — — — — — —

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 Sandy Collins Claudia Porwik
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 %
14 1973 1 1 2 50.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
17 — — — — — — — — — — — — — — — — — 1986 3 3 6 50.0% 3 2 5 60.0% — — — — — — — —
18 — — — — — — — — — — — — — — — — — 1987 4 7 11 36.4% 4 4 8 50.0% 1 4 5 20.0% 4 4 8 50.0%
19 1978 2 2 4 50.0% 0 1 1 0.0% 0 1 1 0.0% — — — — 1988 7 6 13 53.8% 0 4 4 0.0% 4 4 8 50.0% 0 2 2 0.0%
20 1979 0 1 1 0.0% 1 4 5 20.0% 1 1 2 50.0% 0 1 1 0.0% 1989 15 13 28 53.6% 3 3 6 50.0% 1 1 2 50.0% 0 1 1 0.0%
21 1980 4 6 10 40.0% 1 1 2 50.0% 0 1 1 0.0% 5 4 9 55.6% 1990 16 12 28 57.1% — — — — 0 2 2 0.0% 2 3 5 40.0%
22 1981 4 5 9 44.4% 11 6 17 64.7% 3 2 5 60.0% 7 7 14 50.0% 1991 10 13 23 43.5% 1 3 4 25.0% 0 2 2 0.0% 3 2 5 60.0%
23 1982 3 2 5 60.0% 4 5 9 44.4% 0 2 2 0.0% 7 12 19 36.8% 1992 5 11 16 31.3% 0 2 2 0.0% 2 1 3 66.7% 5 4 9 55.6%
24 1983 5 6 11 45.5% 2 6 8 25.0% 2 3 5 40.0% 4 5 9 44.4% 1993 7 11 18 38.9% 2 2 4 50.0% 2 3 5 40.0% 2 4 6 33.3%
25 1984 7 6 13 53.8% 0 3 3 0.0% 0 6 6 0.0% 2 3 5 40.0% 1994 0 1 1 0.0% — — — — — — — — — — — —
26 1985 1 5 6 16.7% 0 1 1 0.0% 0 2 2 0.0% 0 1 1 0.0% 1995 3 4 7 42.9% — — — — 0 2 2 0.0% 1 1 2 50.0%
27 1986 — — — — — — — — 0 1 1 0.0% — — — — 1996 3 2 5 60.0% 0 1 1 0.0% 1 1 2 50.0% 0 1 1 0.0%
28 1987 0 2 2 0.0% — — — — 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — —
29 1988 3 4 7 42.9% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
30 1989 1 5 6 16.7% — — — — 0 1 1 0.0% 1 2 3 33.3% — — — — — — — — — — — — — — — — —
31 1990 0 5 5 0.0% 1 3 4 25.0% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
32 1991 1 2 3 33.3% 0 1 1 0.0% 0 1 1 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
33 1992 1 1 2 50.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
34 1993 — — — — — — — — — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
35 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% — 73 83 156 46.8% 13 21 34 38.2% 11 20 31 35.5% 17 22 39 43.6%

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 Sandy Collins Claudia Porwik
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
14 1973 1497 99.4 — — — — — — — 50.0% 0.00 — — — +0.62 — — — — — — — — — — — — — — — —
17 — — — — — — — — — — — — — — — — 1986 1577 117.2 — — — — +14 +33 — 50.0% -0.42 3–1 (75%) 3–1 (75%) 105.3 +0.65
18 — — — — — — — — — — — — — — — — 1987 1582 120.5 — — — — -4 +32 -42 44.7% -0.46 4–8 (33%) 4–1 (80%) 97.8 +1.43
19 1978 1537 117.1 — — — — +89 — — 57.1% +0.64 0–4 (0%) — — +0.85 1988 1572 125.4 — — — — +20 -30 +14 41.4% -0.72 2–2 (50%) 5–2 (71%) 103.4 +0.38
20 1979 1495 107.9 — — — — — -5 — 30.0% -0.55 0–2 0–1 — +1.38 1989 1661 127.0 — — — — 0 -72 — 52.9% +0.09 4–7 (36%) 2–3 (40%) 97.4 +0.85
21 1980 1631 128.8 — — — — +4 — — 48.9% +0.22 3–2 (60%) 1–2 (33%) 101.6 +0.03 1990 1667 133.5 — — — — +11 — — 52.5% +0.25 6–8 (43%) 5–2 (71%) 99.4 +1.00
22 1981 1786 137.9 — — — — -48 -81 -187 52.6% -0.04 6–3 (67%) 5–4 (56%) 104.5 -1.75 1991 1645 123.9 — — — — +28 -98 — 42.7% -0.60 3–4 (43%) 5–4 (56%) 100.4 -1.33
23 1982 1733 126.3 — — — — -17 -43 — 38.7% -0.91 6–3 (67%) 2–4 (33%) 103.2 -0.59 1992 1606 119.1 — — — — +1 — -25 43.3% -0.63 4–5 (44%) 2–2 (50%) 97.3 +1.85
24 1983 1684 124.1 — — — — +35 -29 -111 40.8% -0.63 2–3 (40%) 1–5 (17%) 95.5 -0.13 1993 1601 124.1 — — — — -13 -41 +10 42.3% -0.62 3–4 (43%) 3–4 (43%) 97.9 -0.38
25 1984 1600 117.7 — — — — +113 -7 -91 34.4% -0.97 4–5 (44%) 1–2 (33%) 98.9 -0.20 1994 1585 97.9 — — — — — — — 0.0% -3.50 — — — +0.19
26 1985 1508 99.2 — — — — +101 — — 18.2% -2.36 0–2 1–0 — +0.70 1995 1551 111.6 — — — — +11 — — 44.4% +0.07 1–4 (20%) 1–4 (20%) 95.2 -0.10
27 1986 1500 101.5 — — — — — — — 33.3% -2.33 0–1 — — -0.02 1996 1564 110.4 — — — — +28 — — 55.0% +0.25 1–3 (25%) — — +0.74
28 1987 1453 94.2 — — — — — — — 11.1% -2.56 0–1 — — +0.23 — — — — — — — — — — — — — — — —
29 1988 1491 114.4 — — — — +84 — — 42.1% -0.63 1–2 (33%) 1–3 (25%) 97.4 -0.02 — — — — — — — — — — — — — — — —
30 1989 1473 103.4 — — — — +55 — — 23.8% -1.71 0–1 2–0 — +0.37 — — — — — — — — — — — — — — — —
31 1990 1421 95.6 — — — — +39 +113 — 17.4% -2.65 1–2 (33%) — — +0.17 — — — — — — — — — — — — — — — —
32 1991 1406 104.6 — — — — +39 — — 21.4% -2.00 1–1 0–1 — +0.16 — — — — — — — — — — — — — — — —
33 1992 1413 104.4 — — — — — — — 33.3% -0.83 — 0–1 — +0.18 — — — — — — — — — — — — — — — —
34 1993 1407 95.8 — — — — — — — 0.0% -5.00 — — — -0.07 — — — — — — — — — — — — — — — —
35 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 — 1787 129.2 — — — — +7 -22 -6 46.3% -0.33 31–46 (40%) 30–23 (57%) 98.7 +2.04

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.