H2H data updated: 2026-09-12 00:00 UTC
Kathleen Cummings holds a 1–0 lead over Marianne Groat in their WTA head-to-head. They have met 1 times in main draws. Most recently, Kathleen Cummings won the 1982 Erie round of 32 6-2 6-2.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Kathleen Cummings | 6-2 6-2 | Marianne Groat | Match data | Jul 22, 1982* | R32 | Erie | WTA 250 | — |
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.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kathleen Cummings | — | — | — | 1,681 | 38 | 50 | 43.2% | 0 | 0 | 0 | 0 | 0 | 0 |
| Marianne Groat | — | — | — | 1,504 | 4 | 13 | 23.5% | 0 | 0 | 0 | 0 | 0 | 0 |
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 | Kathleen Cummings | Marianne Groat | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 17 | — | — | — | — | — | — | — | 1982 | 0–1 | 0.0% | — | 1,488 | 0 | 0 |
| 18 | 1980 | 9–3 | 75.0% | — | 1,595 | 0 | 0 | 1983 | 0–2 | 0.0% | — | 1,461 | 0 | 0 |
| 19 | 1981 | 4–10 | 28.6% | — | 1,597 | 0 | 0 | 1984 | 2–3 | 40.0% | — | 1,471 | 0 | 0 |
| 20 | 1982 | 11–8 | 57.9% | — | 1,622 | 0 | 0 | 1985 | 2–6 | 25.0% | — | 1,462 | 0 | 0 |
| 21 | 1983 | 2–3 | 40.0% | — | 1,643 | 0 | 0 | 1986 | 0–1 | 0.0% | — | 1,456 | 0 | 0 |
| 22 | 1984 | 8–13 | 38.1% | — | 1,589 | 0 | 0 | — | — | — | — | — | — | — |
| 23 | 1985 | 4–12 | 25.0% | — | 1,504 | 0 | 0 | — | — | — | — | — | — | — |
| 24 | 1986 | 0–1 | 0.0% | — | 1,491 | 0 | 0 | — | — | — | — | — | — | — |
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 | Kathleen Cummings | Marianne Groat | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Carpet | Yr | Hard | Clay | Grass | Carpet | |||||||||||||||||||||||||
| 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 % | |||
| 18 | 1980 | 7 | 2 | 9 | 77.8% | — | — | — | — | — | — | — | — | — | — | — | — | 1983 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 1981 | 1 | 5 | 6 | 16.7% | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | 2 | 2 | 4 | 50.0% | 1984 | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1982 | 5 | 4 | 9 | 55.6% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | 1985 | — | — | — | — | 2 | 4 | 6 | 33.3% | 0 | 2 | 2 | 0.0% | — | — | — | — |
| 21 | 1983 | 2 | 1 | 3 | 66.7% | — | — | — | — | — | — | — | — | 0 | 2 | 2 | 0.0% | 1986 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 1984 | 8 | 8 | 16 | 50.0% | 0 | 1 | 1 | 0.0% | 0 | 3 | 3 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 1985 | 1 | 6 | 7 | 14.3% | 1 | 2 | 3 | 33.3% | 1 | 2 | 3 | 33.3% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 1986 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 24 | 27 | 51 | 47.1% | 3 | 6 | 9 | 33.3% | 1 | 6 | 7 | 14.3% | 3 | 7 | 10 | 30.0% | — | 2 | 6 | 8 | 25.0% | 2 | 4 | 6 | 33.3% | 0 | 2 | 2 | 0.0% | — | — | — | — |
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 | Kathleen Cummings | Marianne Groat | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1982 | 1489 | 98.5 | — | — | — | — | — | — | — | 0.0% | -4.00 | — | — | — | -0.14 |
| 18 | 1980 | 1595 | 117.3 | — | — | — | — | +71 | — | — | 70.4% | +1.85 | 2–1 (67%) | 0–1 | — | +2.20 | 1983 | 1462 | 93.6 | — | — | — | — | — | — | — | 20.0% | -2.40 | 0–1 | — | — | +0.30 |
| 19 | 1981 | 1597 | 116.9 | — | — | — | — | +59 | -41 | — | 30.0% | -1.47 | 1–1 | 1–1 | — | -0.77 | 1984 | 1471 | 89.7 | — | — | — | — | +55 | — | — | 36.4% | -1.73 | 1–0 | — | — | +0.44 |
| 20 | 1982 | 1623 | 115.1 | — | — | — | — | +7 | — | — | 61.9% | +0.83 | 0–4 (0%) | 1–3 (25%) | 91.8 | +1.26 | 1985 | 1462 | 102.2 | — | — | — | — | — | +69 | — | 33.3% | -1.56 | 0–2 | 1–0 | — | -0.01 |
| 21 | 1983 | 1644 | 105.3 | — | — | — | — | +9 | — | — | 36.4% | -2.00 | 1–0 | 2–0 | — | -0.20 | 1986 | 1456 | 102.6 | — | — | — | — | — | — | — | 33.3% | -0.67 | 0–1 | — | — | -0.05 |
| 22 | 1984 | 1589 | 99.2 | — | — | — | — | +27 | — | -48 | 38.0% | -1.16 | 5–3 (63%) | 3–1 (75%) | — | +1.28 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 1985 | 1504 | 99.5 | — | — | — | — | +8 | +26 | +10 | 25.0% | -2.09 | — | 0–1 | — | +1.87 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 1986 | 1491 | 98.0 | — | — | — | — | — | — | — | 0.0% | -1.50 | — | 0–1 | — | +0.12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1682 | 111.5 | — | — | — | — | +31 | -8 | -19 | 43.8% | -0.56 | 9–9 (50%) | 7–8 (47%) | 98.0 | +6.55 | — | 1505 | 95.1 | — | — | — | — | +55 | +69 | — | 30.8% | -1.77 | 1–4 (20%) | 1–0 | — | +3.18 |
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Cecilia Fernandez Parker | 2 | 1 | 3 | Oct 10, 1985 | H2H |
| Phyllis Blackwell | 1 | 2 | 3 | Aug 20, 1982 | H2H |
| Amy Holton | 2 | 0 | 2 | Jul 23, 1985 | H2H |
| Pam Casale | 0 | 2 | 2 | May 29, 1985 | H2H |
| Michaela Washington | 0 | 2 | 2 | Mar 7, 1985 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Regina Marsikova | 0 | 1 | 1 | Aug 6, 1986 | H2H |
| Ginny Purdy | 0 | 1 | 1 | Jul 23, 1985 | H2H |
| Hu Na | 0 | 1 | 1 | Jul 18, 1985 | H2H |
| Catherine Tanvier | 0 | 1 | 1 | Jun 26, 1985 | H2H |
| Sylvia Hanika | 0 | 1 | 1 | May 22, 1985 | H2H |