H2H data updated: 2026-09-12 00:00 UTC
Mona Guerrant holds a 1–0 lead over Phyllis Blackwell in their WTA head-to-head. They have met 1 times in main draws. Most recently, Mona Guerrant won the 1980 Delray Beach final 6-4 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.
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Mona Guerrant | 6-4 6-3 | Phyllis Blackwell | Match data | May 17, 1980* | F | Delray Beach | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mona Guerrant | — | — | — | 1,941 | 122 | 116 | 51.3% | 0 | 0 | 0 | 0 | 3 | 3 |
| Phyllis Blackwell | — | — | — | 1,634 | 28 | 26 | 51.9% | 0 | 0 | 0 | 0 | 1 | 1 |
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 | Mona Guerrant | Phyllis Blackwell | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 18 | — | — | — | — | — | — | — | 1975 | 0–2 | 0.0% | — | 1,464 | 0 | 0 |
| 19 | — | — | — | — | — | — | — | 1976 | 1–1 | 50.0% | — | 1,465 | 0 | 0 |
| 20 | 1969 | 1–1 | 50.0% | — | 1,500 | 0 | 0 | 1977 | 0–1 | 0.0% | — | 1,451 | 0 | 0 |
| 21 | 1970 | 1–2 | 33.3% | — | 1,504 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 1971 | 3–8 | 27.3% | — | 1,517 | 0 | 0 | — | — | — | — | — | — | — |
| 23 | 1972 | 28–22 | 56.0% | — | 1,733 | 0 | 1 | 1980 | 5–8 | 38.5% | — | 1,466 | 0 | 0 |
| 24 | 1973 | 17–19 | 47.2% | — | 1,780 | 0 | 2 | — | — | — | — | — | — | — |
| 25 | 1974 | 12–14 | 46.2% | — | 1,779 | 0 | 2 | 1982 | 21–11 | 65.6% | — | 1,605 | 0 | 1 |
| 26 | 1975 | 12–12 | 50.0% | — | 1,905 | 0 | 2 | 1983 | 1–3 | 25.0% | — | 1,593 | 0 | 1 |
| 27 | 1976 | 15–14 | 51.7% | — | 1,898 | 0 | 2 | — | — | — | — | — | — | — |
| 28 | 1977 | 14–9 | 60.9% | — | 1,890 | 0 | 2 | — | — | — | — | — | — | — |
| 29 | 1978 | 5–11 | 31.2% | — | 1,808 | 0 | 2 | — | — | — | — | — | — | — |
| 31 | 1980 | 14–4 | 77.8% | — | 1,812 | 0 | 3 | — | — | — | — | — | — | — |
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 | Mona Guerrant | Phyllis Blackwell | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 20 | 1969 | — | — | — | — | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 1970 | — | — | — | — | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 1971 | 0 | 2 | 2 | 0.0% | 2 | 2 | 4 | 50.0% | 1 | 4 | 5 | 20.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 1972 | 4 | 3 | 7 | 57.1% | 9 | 8 | 17 | 52.9% | 14 | 9 | 23 | 60.9% | 1 | 1 | 2 | 50.0% | 1980 | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | — | — | — | — | 0 | 2 | 2 | 0.0% |
| 24 | 1973 | 3 | 4 | 7 | 42.9% | 7 | 7 | 14 | 50.0% | 2 | 4 | 6 | 33.3% | 5 | 4 | 9 | 55.6% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 1974 | 1 | 2 | 3 | 33.3% | 0 | 3 | 3 | 0.0% | 5 | 5 | 10 | 50.0% | 6 | 4 | 10 | 60.0% | 1982 | 12 | 4 | 16 | 75.0% | 2 | 1 | 3 | 66.7% | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 26 | 1975 | 4 | 4 | 8 | 50.0% | 3 | 2 | 5 | 60.0% | 1 | 1 | 2 | 50.0% | 4 | 5 | 9 | 44.4% | 1983 | 1 | 3 | 4 | 25.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 1976 | 2 | 3 | 5 | 40.0% | 0 | 1 | 1 | 0.0% | 5 | 2 | 7 | 71.4% | 8 | 8 | 16 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 1977 | 2 | 2 | 4 | 50.0% | 6 | 3 | 9 | 66.7% | 4 | 2 | 6 | 66.7% | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 1978 | — | — | — | — | 2 | 2 | 4 | 50.0% | 0 | 2 | 2 | 0.0% | 3 | 7 | 10 | 30.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | 1980 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 2 | 1 | 3 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 16 | 21 | 37 | 43.2% | 31 | 31 | 62 | 50.0% | 32 | 29 | 61 | 52.5% | 31 | 32 | 63 | 49.2% | — | 14 | 9 | 23 | 60.9% | 2 | 2 | 4 | 50.0% | — | — | — | — | 0 | 3 | 3 | 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 | Mona Guerrant | Phyllis Blackwell | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1975 | 1465 | 95.6 | — | — | — | — | — | — | — | 33.3% | -1.34 | 0–2 | — | — | +0.39 |
| 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1976 | 1466 | 99.1 | — | — | — | — | — | — | — | 50.0% | 0.00 | — | — | — | +0.07 |
| 20 | 1969 | 1500 | 92.5 | — | — | — | — | — | — | — | 40.0% | -2.40 | 1–0 | — | — | +0.28 | 1977 | 1452 | 88.5 | — | — | — | — | — | — | — | 0.0% | -6.00 | — | — | — | +0.05 |
| 21 | 1970 | 1504 | 106.4 | — | — | — | — | — | +14 | — | 42.9% | -1.00 | 0–1 | — | — | +0.10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 1971 | 1517 | 118.6 | — | — | — | — | — | +38 | +14 | 35.7% | -0.75 | 2–4 (33%) | 0–3 (0%) | 95.8 | 0.00 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 1972 | 1734 | 136.4 | — | — | — | — | -121 | -79 | -58 | 56.3% | +0.56 | 8–11 (42%) | 5–0 (100%) | 103.8 | +0.32 | 1980 | 1467 | 99.4 | — | — | — | — | +51 | — | — | 37.5% | -1.06 | 4–2 (67%) | 2–0 | — | +0.10 |
| 24 | 1973 | 1781 | 144.7 | — | — | — | — | -54 | -77 | -115 | 48.8% | -0.15 | 3–5 (38%) | 2–2 (50%) | 99.8 | -3.77 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 1974 | 1779 | 137.0 | — | — | — | — | -26 | -97 | -75 | 50.9% | +0.11 | 1–4 (20%) | 3–4 (43%) | 97.1 | -1.56 | 1982 | 1606 | 111.7 | — | — | — | — | +41 | -66 | — | 61.4% | +0.53 | 5–3 (63%) | 8–0 (100%) | 109.3 | +3.28 |
| 26 | 1975 | 1906 | 154.1 | — | — | — | — | -52 | -116 | — | 48.2% | -0.13 | 5–3 (63%) | 2–4 (33%) | 103.0 | -3.85 | 1983 | 1593 | 96.0 | — | — | — | — | +36 | — | — | 22.2% | -2.45 | 1–0 | 0–1 | — | -0.17 |
| 27 | 1976 | 1898 | 149.2 | — | — | — | — | -30 | — | -110 | 55.9% | +0.57 | 2–8 (20%) | 2–5 (29%) | 93.6 | -2.51 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 1977 | 1890 | 136.0 | — | — | — | — | -64 | -47 | -93 | 57.7% | +0.69 | 4–4 (50%) | 3–1 (75%) | 100.8 | -0.54 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 1978 | 1809 | 135.5 | — | — | — | — | -44 | -17 | — | 35.9% | -0.87 | 3–4 (43%) | 0–3 (0%) | — | -2.29 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | 1980 | 1812 | 138.2 | — | — | — | — | -108 | — | — | 73.8% | +2.26 | 4–2 (67%) | 1–0 | — | +0.36 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1942 | 149.0 | — | — | — | — | -53 | -61 | -71 | 52.5% | +0.27 | 33–46 (42%) | 18–22 (45%) | 98.6 | -5.68 | — | 1634 | 103.1 | — | — | — | — | +42 | -66 | — | 49.6% | -0.32 | 10–7 (59%) | 10–1 (91%) | 109.5 | +7.02 |
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 |
|---|---|---|---|---|---|
| Ann Kiyomura Hayashi | 5 | 3 | 8 | Oct 6, 1977 | H2H |
| Virginia Wade | 2 | 6 | 8 | Sep 8, 1977 | H2H |
| Martina Navratilova | 2 | 4 | 6 | Mar 2, 1978 | H2H |
| Evonne Goolagong | 0 | 6 | 6 | Feb 24, 1978 | H2H |
| Rosie Casals | 2 | 4 | 6 | Jan 20, 1978 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Kathleen Cummings | 2 | 1 | 3 | Aug 20, 1982 | H2H |
| Barbara Jordan | 1 | 1 | 2 | Oct 15, 1982 | H2H |
| Lisa Sassano | 2 | 0 | 2 | Aug 14, 1982 | H2H |
| Grace Kim | 1 | 1 | 2 | Jun 25, 1982 | H2H |
| Lisa Doherty | 1 | 1 | 2 | Jun 8, 1980 | H2H |