H2H data updated: 2026-09-11 00:00 UTC

Mona Guerrant vs Helga Masthoff H2H: 0-1

Helga Masthoff holds a 1–0 lead over Mona Guerrant in their WTA head-to-head. Across 1 main-draw meeting, Helga Masthoff leads 1–0 on clay. Most recently, Helga Masthoff won the 1974 St. Petersburg round of 32 6-1 6-2.

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

Mona Guerrant
USA Age 77 Right-Handed
H2H
0 – 1
1 main-draw meetings
Helga Masthoff
FRG Age 84 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Helga Masthoff 6-1 6-2 Mona Guerrant Match data Apr 18, 1974* R32 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
Mona Guerrant — — — 1,941 122 116 51.3% 0 0 0 0 3 3
Helga Masthoff — — — 2,113 391 115 77.3% 0 0 0 4 46 50

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 Mona Guerrant Helga Masthoff
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
20 1969 1–1 50.0% — 1,500 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 — — — — — — —
24 1973 17–19 47.2% — 1,780 0 2 — — — — — — —
25 1974 12–14 46.2% — 1,779 0 2 — — — — — — —
26 1975 12–12 50.0% — 1,905 0 2 1968 29–13 69.0% — 1,730 0 1
27 1976 15–14 51.7% — 1,898 0 2 1969 45–13 77.6% — 1,906 0 10
28 1977 14–9 60.9% — 1,890 0 2 1970 53–12 81.5% — 2,047 0 15
29 1978 5–11 31.2% — 1,808 0 2 1971 42–9 82.4% — 2,084 0 23
30 — — — — — — — 1972 29–12 70.7% — 2,023 0 27
31 1980 14–4 77.8% — 1,812 0 3 1973 40–13 75.5% — 2,087 0 30
32 — — — — — — — 1974 27–10 73.0% — 2,019 0 33
33 — — — — — — — 1975 25–8 75.8% — 1,998 0 37
34 — — — — — — — 1976 34–8 81.0% — 1,950 0 42
35 — — — — — — — 1977 18–4 81.8% — 1,941 0 45
36 — — — — — — — 1978 13–5 72.2% — 1,895 0 45
37 — — — — — — — 1979 10–1 90.9% — 1,930 0 48
38 — — — — — — — 1980 26–7 78.8% — 1,873 0 50

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 Mona Guerrant Helga Masthoff
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 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% — — — — — — — — — — — — — — — — —
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% — — — — — — — — — — — — — — — — —
26 1975 4 4 8 50.0% 3 2 5 60.0% 1 1 2 50.0% 4 5 9 44.4% 1968 2 2 4 50.0% 22 7 29 75.9% 1 1 2 50.0% 4 3 7 57.1%
27 1976 2 3 5 40.0% 0 1 1 0.0% 5 2 7 71.4% 8 8 16 50.0% 1969 3 3 6 50.0% 39 7 46 84.8% — — — — 0 1 1 0.0%
28 1977 2 2 4 50.0% 6 3 9 66.7% 4 2 6 66.7% 2 2 4 50.0% 1970 — — — — 45 10 55 81.8% 3 1 4 75.0% 5 1 6 83.3%
29 1978 — — — — 2 2 4 50.0% 0 2 2 0.0% 3 7 10 30.0% 1971 5 2 7 71.4% 35 5 40 87.5% 2 2 4 50.0% — — — —
30 — — — — — — — — — — — — — — — — — 1972 — — — — 28 8 36 77.8% 0 1 1 0.0% 1 3 4 25.0%
31 1980 0 1 1 0.0% — — — — — — — — 2 1 3 66.7% 1973 — — — — 34 10 44 77.3% 4 1 5 80.0% 2 2 4 50.0%
32 — — — — — — — — — — — — — — — — — 1974 — — — — 24 8 32 75.0% 3 1 4 75.0% 0 1 1 0.0%
33 — — — — — — — — — — — — — — — — — 1975 — — — — 15 6 21 71.4% 9 2 11 81.8% — — — —
34 — — — — — — — — — — — — — — — — — 1976 — — — — 29 5 34 85.3% 5 3 8 62.5% — — — —
35 — — — — — — — — — — — — — — — — — 1977 — — — — 13 2 15 86.7% 1 2 3 33.3% 4 0 4 100.0%
36 — — — — — — — — — — — — — — — — — 1978 — — — — 8 3 11 72.7% — — — — 3 1 4 75.0%
37 — — — — — — — — — — — — — — — — — 1979 — — — — 5 1 6 83.3% — — — — — — — —
38 — — — — — — — — — — — — — — — — — 1980 — — — — 23 6 29 79.3% — — — — — — — —
Career — 16 21 37 43.2% 31 31 62 50.0% 32 29 61 52.5% 31 32 63 49.2% — 10 7 17 58.8% 320 78 398 80.4% 28 14 42 66.7% 19 12 31 61.3%

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 Mona Guerrant Helga Masthoff
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
20 1969 1500 92.5 — — — — — — — 40.0% -2.40 1–0 — — +0.28 — — — — — — — — — — — — — — — —
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 — — — — — — — — — — — — — — — —
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 — — — — — — — — — — — — — — — —
26 1975 1906 154.1 — — — — -52 -116 — 48.2% -0.13 5–3 (63%) 2–4 (33%) 103.0 -3.85 1968 1730 128.1 — — — — -162 +89 — 66.7% +1.31 7–8 (47%) — — -1.04
27 1976 1898 149.2 — — — — -30 — -110 55.9% +0.57 2–8 (20%) 2–5 (29%) 93.6 -2.51 1969 1907 137.1 — — — — -313 +115 — 74.0% +1.89 8–7 (53%) — — -0.20
28 1977 1890 136.0 — — — — -64 -47 -93 57.7% +0.69 4–4 (50%) 3–1 (75%) 100.8 -0.54 1970 2047 159.4 — — — — -330 +75 -427 79.6% +2.22 6–5 (55%) — — -5.92
29 1978 1809 135.5 — — — — -44 -17 — 35.9% -0.87 3–4 (43%) 0–3 (0%) — -2.29 1971 2084 146.6 — — — — -311 +124 -455 72.0% +1.78 17–3 (85%) 2–2 (50%) 105.8 -1.82
30 — — — — — — — — — — — — — — — — 1972 2024 152.0 — — — — -290 +162 — 69.4% +1.51 4–1 (80%) 3–0 (100%) — -3.25
31 1980 1812 138.2 — — — — -108 — — 73.8% +2.26 4–2 (67%) 1–0 — +0.36 1973 2088 160.2 — — — — -369 +126 -344 72.2% +1.77 8–3 (73%) 3–5 (38%) 101.3 -2.46
32 — — — — — — — — — — — — — — — — 1974 2019 153.9 — — — — — +99 -212 67.5% +1.24 8–2 (80%) 2–2 (50%) 102.8 -3.17
33 — — — — — — — — — — — — — — — — 1975 1999 142.8 — — — — — +76 -105 71.6% +1.26 7–3 (70%) 6–3 (67%) 104.5 -0.41
34 — — — — — — — — — — — — — — — — 1976 1951 146.9 — — — — — +125 -61 76.1% +2.14 6–2 (75%) 1–2 (33%) 99.7 +1.10
35 — — — — — — — — — — — — — — — — 1977 1941 128.5 — — — — -150 +143 -91 75.5% +1.73 4–1 (80%) 3–1 (75%) 103.1 +2.07
36 — — — — — — — — — — — — — — — — 1978 1895 134.2 — — — — -97 +128 — 68.4% +1.55 2–2 (50%) 1–0 — +1.22
37 — — — — — — — — — — — — — — — — 1979 1930 131.0 — — — — — +128 — 85.7% +2.86 1–0 1–1 — +0.26
38 — — — — — — — — — — — — — — — — 1980 1873 133.5 — — — — — +139 — 73.1% +1.86 7–5 (58%) 3–2 (60%) 97.5 +1.56
Career — 1942 149.0 — — — — -53 -61 -71 52.5% +0.27 33–46 (42%) 18–22 (45%) 98.6 -5.68 — 2114 153.3 — — — — -250 +115 -205 72.9% +1.76 85–42 (67%) 25–18 (58%) 104.1 -2.42

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.