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

Onny Parun vs Byron Bertram H2H: 0-1

Byron Bertram holds a 1–0 lead over Onny Parun in their ATP head-to-head. Across 1 main-draw meeting, Byron Bertram leads 1–0 on carpet. Most recently, Byron Bertram won the 1976 Los Angeles Open round of 64 7-5 6-3.

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Onny Parun
NZL Age 79 Right-Handed 188 cm / 6'2"
H2H
0 – 1
1 main draw meetings
Byron Bertram
RSA Age 73 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Byron Bertram 7-5 6-3 Onny Parun Match data Sep 22, 1976* R64 Los Angeles Open ATP 250 Carpet

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
Byron Bertram #150 #57 0 1,815 115 139 45.3% 0 0 0 0 0 0

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 Byron Bertram
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 — — — — — — — 1969 0–3 0.0% — 1,467 0 0
17 — — — — — — — 1970 11–11 50.0% — 1,540 0 0
18 — — — — — — — 1971 9–13 40.9% — 1,547 0 0
19 — — — — — — — 1972 2–2 50.0% — 1,536 0 0
20 — — — — — — — 1973 11–10 52.4% #152 1,617 0 0
21 1968 13–16 44.8% — 1,563 0 0 1974 15–13 53.6% #156 1,655 0 0
22 1969 13–22 37.1% — 1,578 0 0 1975 5–8 38.5% #120 1,652 0 0
23 1970 19–21 47.5% — 1,600 0 0 1976 23–24 48.9% #57 1,737 0 0
24 1971 26–24 52.0% — 1,687 0 0 1977 21–27 43.8% #87 1,744 0 0
25 1972 39–36 52.0% — 1,705 0 0 1978 10–11 47.6% #92 1,668 0 0
26 1973 49–43 53.3% #40 1,733 0 1 1979 1–2 33.3% #219 1,649 0 0
27 1974 76–36 67.9% #25 1,946 0 3 1980 7–15 31.8% #150 1,570 0 0
28 1975 65–31 67.7% #26 1,888 0 4 — — — — — — —
29 1976 38–23 62.3% #29 1,843 0 6 — — — — — — —
30 1977 13–27 32.5% #89 1,631 0 6 — — — — — — —
31 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 Onny Parun Byron Bertram
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 — — — — — — — — — — — — — — — — — 1969 0 3 3 0.0% — — — — — — — — — — — —
17 — — — — — — — — — — — — — — — — — 1970 1 3 4 25.0% 2 3 5 40.0% 8 5 13 61.5% — — — —
18 — — — — — — — — — — — — — — — — — 1971 4 5 9 44.4% 0 2 2 0.0% 5 4 9 55.6% 0 2 2 0.0%
19 — — — — — — — — — — — — — — — — — 1972 1 1 2 50.0% — — — — 1 1 2 50.0% — — — —
20 — — — — — — — — — — — — — — — — — 1973 3 3 6 50.0% 1 3 4 25.0% 6 3 9 66.7% 1 1 2 50.0%
21 1968 1 1 2 50.0% 2 7 9 22.2% 9 7 16 56.3% 1 1 2 50.0% 1974 3 1 4 75.0% 1 4 5 20.0% 1 1 2 50.0% 10 7 17 58.8%
22 1969 2 5 7 28.6% 3 8 11 27.3% 8 8 16 50.0% 0 1 1 0.0% 1975 1 3 4 25.0% 3 3 6 50.0% 1 1 2 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% 1976 7 4 11 63.6% 13 15 28 46.4% 0 1 1 0.0% 3 4 7 42.9%
24 1971 11 11 22 50.0% 6 8 14 42.9% 8 4 12 66.7% 1 1 2 50.0% 1977 7 10 17 41.2% 4 7 11 36.4% 6 3 9 66.7% 4 7 11 36.4%
25 1972 2 8 10 20.0% 16 14 30 53.3% 11 6 17 64.7% 10 8 18 55.6% 1978 0 3 3 0.0% 0 1 1 0.0% 0 1 1 0.0% 10 6 16 62.5%
26 1973 15 15 30 50.0% 8 11 19 42.1% 21 7 28 75.0% 5 10 15 33.3% 1979 0 1 1 0.0% — — — — — — — — 1 1 2 50.0%
27 1974 17 8 25 68.0% 35 12 47 74.5% 17 10 27 63.0% 7 6 13 53.8% 1980 4 6 10 40.0% 0 3 3 0.0% 1 4 5 20.0% 2 2 4 50.0%
28 1975 14 5 19 73.7% 32 15 47 68.1% 7 2 9 77.8% 12 9 21 57.1% — — — — — — — — — — — — — — — — —
29 1976 11 3 14 78.6% 18 12 30 60.0% 3 1 4 75.0% 6 7 13 46.2% — — — — — — — — — — — — — — — — —
30 1977 2 5 7 28.6% 8 10 18 44.4% 3 4 7 42.9% 0 8 8 0.0% — — — — — — — — — — — — — — — — —
31 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 — 91 85 176 51.7% 144 138 282 51.1% 95 62 157 60.5% 45 56 101 44.6% — 31 43 74 41.9% 24 41 65 36.9% 29 24 53 54.7% 31 31 62 50.0%

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 Byron Bertram
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 — — — — — — — — — — — — — — — — 1969 1467 97.7 — — — — +26 — — 20.0% -2.20 — — — -0.10
17 — — — — — — — — — — — — — — — — 1970 1541 119.6 — — — — -55 -40 +104 49.1% -0.21 0–1 — — +0.86
18 — — — — — — — — — — — — — — — — 1971 1547 108.9 — — — — -39 — +97 47.5% -0.13 2–7 (22%) 3–2 (60%) — +2.12
19 — — — — — — — — — — — — — — — — 1972 1536 105.5 — — — — — — — 54.5% +1.27 — 0–1 — +0.31
20 — — — — — — — — — — — — — — — — 1973 1618 113.6 — — — — +1 -147 +39 49.0% -0.12 5–3 (63%) 2–2 (50%) — +1.62
21 1968 1564 110.6 — — — — -9 -142 +80 52.6% -0.07 4–9 (31%) — — -0.25 1974 1655 122.3 — — — — +78 -202 — 53.2% +0.08 5–3 (63%) 5–2 (71%) — +2.72
22 1969 1578 108.4 — — — — -30 -201 +65 39.1% -0.60 6–7 (46%) — — -0.52 1975 1653 123.3 — — — — +13 -136 — 44.1% -0.26 2–3 (40%) 3–2 (60%) — -0.16
23 1970 1600 119.0 — — — — +48 -91 -16 48.4% -0.13 5–3 (63%) 2–2 (50%) — +1.16 1976 1737 135.3 — — — — +19 -143 — 48.7% -0.04 10–8 (56%) 5–6 (45%) — -0.81
24 1971 1687 128.1 — — — — -46 -169 +78 51.6% +0.21 2–7 (22%) 5–10 (33%) — +1.55 1977 1745 136.0 — — — — -14 -174 +50 43.4% -0.53 11–5 (69%) 4–7 (36%) — -2.84
25 1972 1706 125.9 — — — — -55 -49 +96 50.8% +0.31 10–9 (53%) 6–15 (29%) — +2.98 1978 1668 116.8 — — — — +30 — — 45.7% -0.35 2–1 (67%) 3–1 (75%) — +3.30
26 1973 1734 138.8 — — — — -6 -118 +241 53.0% +0.37 12–13 (48%) 13–20 (39%) — -0.99 1979 1650 106.6 — — — — +23 — — 28.6% -0.86 1–0 0–1 — +0.39
27 1974 1947 147.2 — — — — -21 -11 -72 62.6% +0.83 19–14 (58%) 18–10 (64%) — +1.03 1980 1570 124.2 — — — — +66 -71 +169 38.9% -0.57 2–5 (29%) 5–6 (45%) — -0.40
28 1975 1889 140.3 — — — — +1 +51 -4 58.8% +0.55 27–4 (87%) 13–14 (48%) — +0.29 — — — — — — — — — — — — — — — —
29 1976 1844 142.1 — — — — +61 +37 +88 60.0% +0.35 10–5 (67%) 19–9 (68%) — +0.73 — — — — — — — — — — — — — — — —
30 1977 1631 137.9 — — — — +90 +96 +207 40.0% -0.57 5–10 (33%) 7–8 (47%) — -2.17 — — — — — — — — — — — — — — — —
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 — 1991 136.8 — — — — +8 -23 +87 51.4% +0.14 108–98 (52%) 92–112 (45%) 97.2 +0.73 — 1816 130.3 — — — — +20 -141 +86 46.2% -0.25 40–36 (53%) 30–30 (50%) 106.0 +2.79

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.