H2H data updated: 2026-09-03 00:00 UTC

Onny Parun vs Dennis Ralston H2H: 0-1

Dennis Ralston holds a 1–0 lead over Onny Parun in their ATP head-to-head. Across 1 main-draw meeting, Dennis Ralston leads 1–0 on clay. Most recently, Dennis Ralston won the 1971 Washington Open round of 32 7-6 6-2.

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Onny Parun
NZL Age 79 Right-Handed 188 cm / 6'2"
H2H
0 – 1
1 main draw meetings
Dennis Ralston
USA Right-Handed 188 cm / 6'2"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Dennis Ralston 7-6 6-2 Onny Parun Match data Jul 20, 1971* R32 Washington Open ATP 250 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
Onny Parun #398 #19 0 1,991 375 341 52.4% 0 0 0 0 6 6
Dennis Ralston #287 #115 0 1,958 156 135 53.6% 0 0 0 0 4 4

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 Onny Parun Dennis Ralston
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
21 1968 13–16 44.8% — 1,563 0 0 — — — — — — —
22 1969 13–22 37.1% — 1,578 0 0 — — — — — — —
23 1970 19–21 47.5% — 1,600 0 0 — — — — — — —
24 1971 26–24 52.0% — 1,687 0 0 — — — — — — —
25 1972 39–36 52.0% — 1,705 0 0 1968 48–25 65.8% — 1,694 0 3
26 1973 49–43 53.3% #40 1,733 0 1 1969 28–24 53.8% — 1,787 0 3
27 1974 76–36 67.9% #25 1,946 0 3 1970 41–28 59.4% — 1,897 0 4
28 1975 65–31 67.7% #26 1,888 0 4 1971 27–21 56.2% — 1,870 0 4
29 1976 38–23 62.3% #29 1,843 0 6 1972 2–8 20.0% — 1,773 0 4
30 1977 13–27 32.5% #89 1,631 0 6 1973 1–6 14.3% #219 1,693 0 4
31 1978 1–14 6.7% #210 1,504 0 6 1974 3–5 37.5% #147 1,700 0 4
32 1979 3–15 16.7% #214 1,429 0 6 1975 1–4 20.0% #187 1,651 0 4
33 1980 15–19 44.1% #96 1,597 0 6 1976 1–9 10.0% #248 1,578 0 4
34 1981 5–13 27.8% #99 1,529 0 6 1977 1–2 33.3% #253 1,593 0 4
35 1982 0–1 0.0% — 1,515 0 6 1978 0–1 0.0% #287 1,586 0 4
37 — — — — — — — 1980 3–2 60.0% — 1,626 0 4

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 Onny Parun Dennis Ralston
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 %
21 1968 1 1 2 50.0% 2 7 9 22.2% 9 7 16 56.3% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
22 1969 2 5 7 28.6% 3 8 11 27.3% 8 8 16 50.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
23 1970 4 4 8 50.0% 10 11 21 47.6% 3 4 7 42.9% 2 2 4 50.0% — — — — — — — — — — — — — — — — —
24 1971 11 11 22 50.0% 6 8 14 42.9% 8 4 12 66.7% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
25 1972 2 8 10 20.0% 16 14 30 53.3% 11 6 17 64.7% 10 8 18 55.6% 1968 4 2 6 66.7% 5 3 8 62.5% 10 5 15 66.7% 29 15 44 65.9%
26 1973 15 15 30 50.0% 8 11 19 42.1% 21 7 28 75.0% 5 10 15 33.3% 1969 4 3 7 57.1% 4 6 10 40.0% 14 5 19 73.7% 6 10 16 37.5%
27 1974 17 8 25 68.0% 35 12 47 74.5% 17 10 27 63.0% 7 6 13 53.8% 1970 16 14 30 53.3% — — — — 14 7 21 66.7% 11 7 18 61.1%
28 1975 14 5 19 73.7% 32 15 47 68.1% 7 2 9 77.8% 12 9 21 57.1% 1971 5 4 9 55.6% 10 6 16 62.5% 6 5 11 54.5% 6 6 12 50.0%
29 1976 11 3 14 78.6% 18 12 30 60.0% 3 1 4 75.0% 6 7 13 46.2% 1972 0 6 6 0.0% — — — — — — — — 2 2 4 50.0%
30 1977 2 5 7 28.6% 8 10 18 44.4% 3 4 7 42.9% 0 8 8 0.0% 1973 1 4 5 20.0% — — — — — — — — 0 2 2 0.0%
31 1978 1 2 3 33.3% 0 10 10 0.0% 0 1 1 0.0% 0 1 1 0.0% 1974 3 3 6 50.0% — — — — 0 1 1 0.0% 0 1 1 0.0%
32 1979 0 7 7 0.0% 2 6 8 25.0% 1 1 2 50.0% 0 1 1 0.0% 1975 0 1 1 0.0% 0 2 2 0.0% — — — — 1 1 2 50.0%
33 1980 8 8 16 50.0% 3 7 10 30.0% 3 3 6 50.0% 1 1 2 50.0% 1976 1 4 5 20.0% — — — — — — — — 0 5 5 0.0%
34 1981 3 2 5 60.0% 1 7 8 12.5% 1 4 5 20.0% — — — — 1977 0 1 1 0.0% — — — — 1 1 2 50.0% — — — —
35 1982 0 1 1 0.0% — — — — — — — — — — — — 1978 — — — — — — — — — — — — 0 1 1 0.0%
37 — — — — — — — — — — — — — — — — — 1980 0 1 1 0.0% — — — — 3 1 4 75.0% — — — —
Career — 91 85 176 51.7% 144 138 282 51.1% 95 62 157 60.5% 45 56 101 44.6% — 34 43 77 44.2% 19 17 36 52.8% 48 25 73 65.8% 55 50 105 52.4%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. 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 Onny Parun Dennis Ralston
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
21 1968 1564 110.6 — — — — -9 -142 +80 52.6% -0.07 4–9 (31%) — — -0.25 — — — — — — — — — — — — — — — —
22 1969 1578 108.4 — — — — -30 -201 +65 39.1% -0.60 6–7 (46%) — — -0.52 — — — — — — — — — — — — — — — —
23 1970 1600 119.0 — — — — +48 -91 -16 48.4% -0.13 5–3 (63%) 2–2 (50%) — +1.16 — — — — — — — — — — — — — — — —
24 1971 1687 128.1 — — — — -46 -169 +78 51.6% +0.21 2–7 (22%) 5–10 (33%) — +1.55 — — — — — — — — — — — — — — — —
25 1972 1706 125.9 — — — — -55 -49 +96 50.8% +0.31 10–9 (53%) 6–15 (29%) — +2.98 1968 1694 112.7 — — — — +4 -104 +39 64.2% +1.56 11–5 (69%) — — +3.26
26 1973 1734 138.8 — — — — -6 -118 +241 53.0% +0.37 12–13 (48%) 13–20 (39%) — -0.99 1969 1788 133.1 — — — — -116 -165 +110 56.8% +0.27 7–12 (37%) 1–2 (33%) — -0.96
27 1974 1947 147.2 — — — — -21 -11 -72 62.6% +0.83 19–14 (58%) 18–10 (64%) — +1.03 1970 1898 144.3 — — — — -6 — +36 57.5% +0.56 13–8 (62%) 8–5 (62%) — -2.41
28 1975 1889 140.3 — — — — +1 +51 -4 58.8% +0.55 27–4 (87%) 13–14 (48%) — +0.29 1971 1870 145.6 — — — — +26 -115 -40 55.9% +0.35 10–9 (53%) 10–7 (59%) — -4.83
29 1976 1844 142.1 — — — — +61 +37 +88 60.0% +0.35 10–5 (67%) 19–9 (68%) — +0.73 1972 1773 103.2 — — — — -28 — — 31.6% -1.47 1–2 (33%) 1–0 — +0.82
30 1977 1631 137.9 — — — — +90 +96 +207 40.0% -0.57 5–10 (33%) 7–8 (47%) — -2.17 1973 1693 110.4 — — — — -41 — — 20.0% -1.40 0–1 1–2 (33%) — -0.63
31 1978 1504 119.8 — — — — +170 +86 — 23.1% -1.85 0–6 (0%) 2–4 (33%) — -0.08 1974 1701 123.5 — — — — -32 — — 38.9% -1.11 — 2–0 — -1.16
32 1979 1429 103.3 — — — — +100 +116 — 19.5% -1.76 0–1 0–6 (0%) — +1.15 1975 1651 108.9 — — — — -3 — — 30.8% -1.46 1–1 3–1 (75%) — -0.29
33 1980 1598 128.8 — — — — +25 -79 +188 47.3% -0.08 6–9 (40%) 7–8 (47%) — +0.57 1976 1579 103.5 — — — — -38 — — 19.0% -2.62 1–2 (33%) 3–2 (60%) — -0.04
34 1981 1529 117.5 — — — — +118 -85 +178 22.2% -1.42 2–0 0–6 (0%) — -0.41 1977 1593 106.1 — — — — — — — 45.5% -0.54 0–1 0–1 — -0.26
35 1982 1516 100.7 — — — — — — — 33.3% -1.00 0–1 — — +0.11 1978 1586 102.9 — — — — — — — 0.0% -3.50 — — — -0.08
37 — — — — — — — — — — — — — — — — 1980 1626 122.5 — — — — — — +215 60.0% +0.40 — — — +0.01
Career — 1991 136.8 — — — — +8 -23 +87 51.4% +0.14 108–98 (52%) 92–112 (45%) 97.2 +0.73 — 1958 135.6 — — — — -19 -127 +55 54.5% +0.38 44–41 (52%) 29–20 (59%) 105.6 -2.33

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.