H2H data updated: 2026-09-01 00:00 UTC

Ross Case vs Onny Parun H2H: 1-4

Onny Parun holds a 4–1 lead over Ross Case in their ATP head-to-head. Across 5 main-draw meetings, Onny Parun leads 2–1 on hard courts and 2–0 on grass. Most recently, Onny Parun won the 1974 Jakarta quarterfinal 7-5 6-4.

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Ross Case
AUS Age 74 Right-Handed
H2H
1 – 4
5 main draw meetings
Onny Parun
NZL Age 79 Right-Handed 188 cm / 6'2"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Onny Parun 7-5 6-4 Ross Case Match data Nov 8, 1974* QF Jakarta ATP 250 Hard
Onny Parun 6-2 7-6 Ross Case Match data Oct 24, 1974* R16 Sydney Indoor ATP 250 Hard
Onny Parun 7-5 6-3 6-1 Ross Case Match data Jan 12, 1974* SF ASB Classic ATP 250 Grass
Onny Parun #57 6-4 6-1 4-6 6-4 Ross Case #62 Match data Sep 7, 1973* R16 US Open Grand Slam Grass
Ross Case 3-6 6-3 7-6 Onny Parun Match data Sep 29, 1971* R64 Berkeley ATP 250 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
Ross Case #758 #24 0 1,962 293 274 51.7% 0 0 0 0 4 4
Onny Parun #398 #19 0 1,991 375 341 52.4% 0 0 0 0 6 6

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 Ross Case Onny Parun
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 1968 3–3 50.0% — 1,519 0 0 — — — — — — —
17 1969 4–4 50.0% — 1,538 0 0 — — — — — — —
18 1970 11–8 57.9% — 1,560 0 0 — — — — — — —
19 1971 26–20 56.5% — 1,637 0 0 — — — — — — —
20 1972 22–21 51.2% — 1,685 0 0 — — — — — — —
21 1973 42–34 55.3% #42 1,811 0 1 1968 13–16 44.8% — 1,563 0 0
22 1974 42–27 60.9% #29 1,820 0 2 1969 13–22 37.1% — 1,578 0 0
23 1975 38–21 64.4% #27 1,936 0 4 1970 19–21 47.5% — 1,600 0 0
24 1976 28–24 53.8% #45 1,837 0 4 1971 26–24 52.0% — 1,687 0 0
25 1977 21–24 46.7% #48 1,749 0 4 1972 39–36 52.0% — 1,705 0 0
26 1978 14–19 42.4% #86 1,679 0 4 1973 49–43 53.3% #40 1,733 0 1
27 1979 24–26 48.0% #74 1,676 0 4 1974 76–36 67.9% #25 1,946 0 3
28 1980 11–20 35.5% #163 1,621 0 4 1975 65–31 67.7% #26 1,888 0 4
29 1981 5–15 25.0% — 1,502 0 4 1976 38–23 62.3% #29 1,843 0 6
30 1982 1–5 16.7% — 1,467 0 4 1977 13–27 32.5% #89 1,631 0 6
31 1983 1–3 25.0% #415 1,458 0 4 1978 1–14 6.7% #210 1,504 0 6
32 — — — — — — — 1979 3–15 16.7% #214 1,429 0 6
33 — — — — — — — 1980 15–19 44.1% #96 1,597 0 6
34 — — — — — — — 1981 5–13 27.8% #99 1,529 0 6
35 — — — — — — — 1982 0–1 0.0% — 1,515 0 6

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 Ross Case Onny Parun
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 %
16 1968 — — — — — — — — 3 3 6 50.0% — — — — — — — — — — — — — — — — — — — — —
17 1969 — — — — — — — — 4 4 8 50.0% — — — — — — — — — — — — — — — — — — — — —
18 1970 0 2 2 0.0% 1 3 4 25.0% 10 3 13 76.9% — — — — — — — — — — — — — — — — — — — — —
19 1971 10 8 18 55.6% 2 5 7 28.6% 14 7 21 66.7% — — — — — — — — — — — — — — — — — — — — —
20 1972 6 7 13 46.2% 0 3 3 0.0% 11 7 18 61.1% 5 4 9 55.6% — — — — — — — — — — — — — — — — —
21 1973 10 5 15 66.7% 17 14 31 54.8% 11 7 18 61.1% 4 8 12 33.3% 1968 1 1 2 50.0% 2 7 9 22.2% 9 7 16 56.3% 1 1 2 50.0%
22 1974 15 13 28 53.6% 8 6 14 57.1% 9 5 14 64.3% 10 3 13 76.9% 1969 2 5 7 28.6% 3 8 11 27.3% 8 8 16 50.0% 0 1 1 0.0%
23 1975 21 8 29 72.4% 8 6 14 57.1% 7 2 9 77.8% 2 5 7 28.6% 1970 4 4 8 50.0% 10 11 21 47.6% 3 4 7 42.9% 2 2 4 50.0%
24 1976 5 6 11 45.5% 5 4 9 55.6% 8 4 12 66.7% 10 10 20 50.0% 1971 11 11 22 50.0% 6 8 14 42.9% 8 4 12 66.7% 1 1 2 50.0%
25 1977 8 8 16 50.0% 0 1 1 0.0% 8 7 15 53.3% 5 8 13 38.5% 1972 2 8 10 20.0% 16 14 30 53.3% 11 6 17 64.7% 10 8 18 55.6%
26 1978 4 6 10 40.0% 2 2 4 50.0% 6 5 11 54.5% 2 6 8 25.0% 1973 15 15 30 50.0% 8 11 19 42.1% 21 7 28 75.0% 5 10 15 33.3%
27 1979 4 7 11 36.4% 10 9 19 52.6% 9 5 14 64.3% 1 5 6 16.7% 1974 17 8 25 68.0% 35 12 47 74.5% 17 10 27 63.0% 7 6 13 53.8%
28 1980 2 3 5 40.0% 7 9 16 43.8% 1 4 5 20.0% 1 4 5 20.0% 1975 14 5 19 73.7% 32 15 47 68.1% 7 2 9 77.8% 12 9 21 57.1%
29 1981 1 7 8 12.5% 2 4 6 33.3% 2 3 5 40.0% 0 1 1 0.0% 1976 11 3 14 78.6% 18 12 30 60.0% 3 1 4 75.0% 6 7 13 46.2%
30 1982 0 1 1 0.0% — — — — 0 2 2 0.0% 1 2 3 33.3% 1977 2 5 7 28.6% 8 10 18 44.4% 3 4 7 42.9% 0 8 8 0.0%
31 1983 1 2 3 33.3% — — — — — — — — 0 1 1 0.0% 1978 1 2 3 33.3% 0 10 10 0.0% 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%
33 — — — — — — — — — — — — — — — — — 1980 8 8 16 50.0% 3 7 10 30.0% 3 3 6 50.0% 1 1 2 50.0%
34 — — — — — — — — — — — — — — — — — 1981 3 2 5 60.0% 1 7 8 12.5% 1 4 5 20.0% — — — —
35 — — — — — — — — — — — — — — — — — 1982 0 1 1 0.0% — — — — — — — — — — — —
Career — 87 83 170 51.2% 62 66 128 48.4% 103 68 171 60.2% 41 57 98 41.8% — 91 85 176 51.7% 144 138 282 51.1% 95 62 157 60.5% 45 56 101 44.6%

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 Ross Case Onny Parun
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
16 1968 1519 97.0 — — — — — — +27 50.0% -0.57 1–1 — — +0.29 — — — — — — — — — — — — — — — —
17 1969 1538 111.9 — — — — — — +28 40.0% -0.15 2–0 — — +0.09 — — — — — — — — — — — — — — — —
18 1970 1560 109.1 — — — — — -78 +73 50.0% -0.02 4–2 (67%) 1–1 — +2.54 — — — — — — — — — — — — — — — —
19 1971 1638 118.4 — — — — -15 -130 +69 53.8% +0.08 7–3 (70%) 6–9 (40%) — +3.95 — — — — — — — — — — — — — — — —
20 1972 1685 119.5 — — — — +8 -217 +88 53.0% -0.09 6–6 (50%) 7–2 (78%) — +2.54 — — — — — — — — — — — — — — — —
21 1973 1811 144.2 — — — — -4 -97 -10 53.1% +0.25 14–8 (64%) 7–15 (32%) — -2.77 1968 1564 110.6 — — — — -9 -142 +80 52.6% -0.07 4–9 (31%) — — -0.25
22 1974 1820 143.4 — — — — +14 -88 +26 57.1% +0.54 13–8 (62%) 12–9 (57%) — -2.23 1969 1578 108.4 — — — — -30 -201 +65 39.1% -0.60 6–7 (46%) — — -0.52
23 1975 1937 143.0 — — — — +8 -189 -46 59.7% +0.58 15–10 (60%) 11–3 (79%) — +0.72 1970 1600 119.0 — — — — +48 -91 -16 48.4% -0.13 5–3 (63%) 2–2 (50%) — +1.16
24 1976 1837 150.4 — — — — +17 -79 +82 54.5% +0.20 7–11 (39%) 13–14 (48%) — -3.31 1971 1687 128.1 — — — — -46 -169 +78 51.6% +0.21 2–7 (22%) 5–10 (33%) — +1.55
25 1977 1750 141.1 — — — — +2 — +96 44.0% -0.15 9–6 (60%) 5–8 (38%) — -3.52 1972 1706 125.9 — — — — -55 -49 +96 50.8% +0.31 10–9 (53%) 6–15 (29%) — +2.98
26 1978 1679 126.3 — — — — -11 +32 +126 46.0% -0.43 7–11 (39%) 6–4 (60%) — +0.45 1973 1734 138.8 — — — — -6 -118 +241 53.0% +0.37 12–13 (48%) 13–20 (39%) — -0.99
27 1979 1676 135.6 — — — — -77 +31 +155 47.7% -0.18 9–8 (53%) 6–10 (38%) — -2.48 1974 1947 147.2 — — — — -21 -11 -72 62.6% +0.83 19–14 (58%) 18–10 (64%) — +1.03
28 1980 1621 128.5 — — — — -49 +77 +125 40.5% -0.63 4–6 (40%) 5–7 (42%) — -0.60 1975 1889 140.3 — — — — +1 +51 -4 58.8% +0.55 27–4 (87%) 13–14 (48%) — +0.29
29 1981 1503 104.6 — — — — -34 +123 +209 31.4% -1.16 2–5 (29%) 1–4 (20%) — +1.19 1976 1844 142.1 — — — — +61 +37 +88 60.0% +0.35 10–5 (67%) 19–9 (68%) — +0.73
30 1982 1467 105.7 — — — — +2 — — 25.0% -1.12 1–1 0–2 — +0.37 1977 1631 137.9 — — — — +90 +96 +207 40.0% -0.57 5–10 (33%) 7–8 (47%) — -2.17
31 1983 1459 103.5 — — — — -6 — — 36.4% -0.82 1–2 (33%) 2–3 (40%) — +0.31 1978 1504 119.8 — — — — +170 +86 — 23.1% -1.85 0–6 (0%) 2–4 (33%) — -0.08
32 — — — — — — — — — — — — — — — — 1979 1429 103.3 — — — — +100 +116 — 19.5% -1.76 0–1 0–6 (0%) — +1.15
33 — — — — — — — — — — — — — — — — 1980 1598 128.8 — — — — +25 -79 +188 47.3% -0.08 6–9 (40%) 7–8 (47%) — +0.57
34 — — — — — — — — — — — — — — — — 1981 1529 117.5 — — — — +118 -85 +178 22.2% -1.42 2–0 0–6 (0%) — -0.41
35 — — — — — — — — — — — — — — — — 1982 1516 100.7 — — — — — — — 33.3% -1.00 0–1 — — +0.11
Career — 1962 139.3 — — — — -4 -53 +70 50.7% +0.02 102–88 (54%) 82–91 (47%) 99.4 -0.44 — 1991 136.8 — — — — +8 -23 +87 51.4% +0.14 108–98 (52%) 92–112 (45%) 97.2 +0.73

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.