H2H data updated: 2026-10-20 00:00 UTC

Onny Parun vs Zan Guerry H2H: 2-1

Onny Parun holds a 2–1 lead over Zan Guerry in their ATP head-to-head. Across 3 main-draw meetings, they are tied 1–1 on clay, while Onny Parun leads 1–0 on hard courts. Most recently, Zan Guerry won the 1977 Argentina Open round of 32 6-1 3-6 6-3.

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Onny Parun
NZL Age 79 Right-Handed 188 cm / 6'2"
H2H
2 – 1
3 main-draw meetings
Zan Guerry
USA Age 77 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Zan Guerry 6-1 3-6 6-3 Onny Parun Match data Nov 24, 1977* R32 Argentina Open ATP 250 Clay
Onny Parun 4-6 7-6 6-4 Zan Guerry Match data Aug 9, 1972* R64 Indianapolis ATP 250 Clay
Onny Parun 4-6 6-1 7-5 Zan Guerry Match data Jul 20, 1970* R64 Washington Open 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
Onny Parun #398 #19 0 1,990 374 340 52.4% 0 0 0 0 6 6
Zan Guerry #490 #98 0 1,598 41 76 35.0% 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 Zan Guerry
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
19 — — — — — — — 1968 4–6 40.0% — 1,476 0 0
20 — — — — — — — 1969 8–10 44.4% — 1,526 0 0
21 1968 13–16 44.8% — 1,563 0 0 1970 1–3 25.0% — 1,509 0 0
22 1969 13–22 37.1% — 1,578 0 0 1971 4–6 40.0% — 1,511 0 0
23 1970 18–20 47.4% — 1,597 0 0 1972 5–7 41.7% — 1,513 0 0
24 1971 26–24 52.0% — 1,686 0 0 1973 3–5 37.5% #203 1,515 0 0
25 1972 39–36 52.0% — 1,705 0 0 1974 1–1 50.0% #228 1,536 0 0
26 1973 49–43 53.3% #40 1,733 0 1 1975 2–2 50.0% #205 1,565 0 0
27 1974 76–36 67.9% #25 1,946 0 3 1976 0–6 0.0% #176 1,500 0 0
28 1975 65–31 67.7% #26 1,888 0 4 1977 8–16 33.3% #98 1,562 0 0
29 1976 38–23 62.3% #29 1,843 0 6 1978 2–7 22.2% #279 1,522 0 0
30 1977 13–27 32.5% #89 1,631 0 6 1979 1–3 25.0% #326 1,517 0 0
31 1978 1–14 6.7% #210 1,504 0 6 1980 1–2 33.3% — 1,483 0 0
32 1979 3–15 16.7% #214 1,429 0 6 1981 0–1 0.0% — 1,477 0 0
33 1980 15–19 44.1% #96 1,597 0 6 1982 1–1 50.0% — 1,498 0 0
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 Zan Guerry
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 %
19 — — — — — — — — — — — — — — — — — 1968 — — — — 3 3 6 50.0% 1 3 4 25.0% — — — —
20 — — — — — — — — — — — — — — — — — 1969 0 1 1 0.0% 6 5 11 54.5% 2 4 6 33.3% — — — —
21 1968 1 1 2 50.0% 2 7 9 22.2% 9 7 16 56.3% 1 1 2 50.0% 1970 0 1 1 0.0% 1 2 3 33.3% — — — — — — — —
22 1969 2 5 7 28.6% 3 8 11 27.3% 8 8 16 50.0% 0 1 1 0.0% 1971 2 2 4 50.0% 2 3 5 40.0% 0 1 1 0.0% — — — —
23 1970 4 4 8 50.0% 9 10 19 47.4% 3 4 7 42.9% 2 2 4 50.0% 1972 1 2 3 33.3% 4 4 8 50.0% 0 1 1 0.0% — — — —
24 1971 11 11 22 50.0% 6 8 14 42.9% 8 4 12 66.7% 1 1 2 50.0% 1973 2 4 6 33.3% — — — — 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% 1974 — — — — 1 1 2 50.0% — — — — — — — —
26 1973 15 15 30 50.0% 8 11 19 42.1% 21 7 28 75.0% 5 10 15 33.3% 1975 1 1 2 50.0% 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% 1976 0 2 2 0.0% 0 3 3 0.0% — — — — 0 1 1 0.0%
28 1975 14 5 19 73.7% 32 15 47 68.1% 7 2 9 77.8% 12 9 21 57.1% 1977 0 3 3 0.0% 8 11 19 42.1% — — — — 0 2 2 0.0%
29 1976 11 3 14 78.6% 18 12 30 60.0% 3 1 4 75.0% 6 7 13 46.2% 1978 — — — — 2 3 5 40.0% — — — — 0 4 4 0.0%
30 1977 2 5 7 28.6% 8 10 18 44.4% 3 4 7 42.9% 0 8 8 0.0% 1979 0 1 1 0.0% 1 2 3 33.3% — — — — — — — —
31 1978 1 2 3 33.3% 0 10 10 0.0% 0 1 1 0.0% 0 1 1 0.0% 1980 — — — — 0 1 1 0.0% 1 1 2 50.0% — — — —
32 1979 0 7 7 0.0% 2 6 8 25.0% 1 1 2 50.0% 0 1 1 0.0% 1981 — — — — 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% 1982 — — — — 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% 143 137 280 51.1% 95 62 157 60.5% 45 56 101 44.6% — 6 17 23 26.1% 30 41 71 42.3% 5 11 16 31.2% 0 7 7 0.0%

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 Onny Parun Zan Guerry
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
19 — — — — — — — — — — — — — — — — 1968 1477 99.0 — — — — — +41 -13 41.7% -0.50 1–1 — — -0.13
20 — — — — — — — — — — — — — — — — 1969 1527 112.6 — — — — — +58 -60 47.9% -0.10 3–3 (50%) — — -0.60
21 1968 1564 110.6 — — — — -9 -142 +80 52.6% -0.07 4–9 (31%) — — -0.25 1970 1509 100.8 — — — — — +67 — 36.4% -1.36 1–2 (33%) — — +0.06
22 1969 1578 108.4 — — — — -30 -201 +65 39.1% -0.60 6–7 (46%) — — -0.53 1971 1512 109.1 — — — — -8 +73 — 34.8% -0.43 2–1 (67%) 0–3 (0%) 99.0 +0.02
23 1970 1598 117.6 — — — — +50 -98 -14 48.3% -0.18 5–3 (63%) 2–2 (50%) 103.3 +1.24 1972 1513 101.7 — — — — -18 +69 — 45.5% -0.03 3–4 (43%) 3–6 (33%) 95.4 +1.00
24 1971 1686 128.0 — — — — -45 -174 +79 51.6% +0.21 2–7 (22%) 5–10 (33%) 93.6 +1.56 1973 1516 109.4 — — — — -6 — — 45.8% -0.17 2–3 (40%) 2–2 (50%) 101.5 +0.71
25 1972 1706 125.9 — — — — -55 -52 +95 50.8% +0.31 10–9 (53%) 6–15 (29%) 97.4 +2.95 1974 1537 108.8 — — — — — — — 50.0% -0.50 — 1–0 — -0.19
26 1973 1733 138.7 — — — — -5 -117 +242 53.0% +0.37 12–13 (48%) 13–20 (39%) 94.3 -0.93 1975 1565 108.3 — — — — — — — 44.4% -0.22 1–0 0–1 — +0.08
27 1974 1946 147.2 — — — — -20 -9 -71 62.6% +0.83 19–14 (58%) 18–10 (64%) 106.8 +1.02 1976 1500 112.0 — — — — -21 +41 — 14.3% -1.71 0–1 0–1 — +0.12
28 1975 1889 140.3 — — — — +1 +50 -4 58.8% +0.55 27–4 (87%) 13–14 (48%) 110.4 +0.28 1977 1563 135.9 — — — — -120 +42 — 39.3% -0.73 2–6 (25%) 1–2 (33%) — -0.82
29 1976 1844 142.1 — — — — +61 +38 +88 60.0% +0.35 10–5 (67%) 19–9 (68%) 108.6 +0.73 1978 1523 109.4 — — — — -107 +79 — 37.5% -1.04 1–5 (17%) 2–0 — +0.86
30 1977 1631 137.9 — — — — +90 +96 +207 40.0% -0.57 5–10 (33%) 7–8 (47%) 92.3 -2.17 1979 1518 104.3 — — — — — +61 — 40.0% -0.70 0–2 — — -0.17
31 1978 1504 119.8 — — — — +170 +86 — 23.1% -1.85 0–6 (0%) 2–4 (33%) 90.9 -0.08 1980 1484 91.9 — — — — — — — 0.0% -3.75 — — — +0.48
32 1979 1429 103.3 — — — — +100 +116 — 19.5% -1.76 0–1 0–6 (0%) — +1.15 1981 1478 100.2 — — — — — — — 0.0% -3.50 — — — -0.08
33 1980 1598 128.8 — — — — +25 -79 +188 47.3% -0.08 6–9 (40%) 7–8 (47%) 98.9 +0.57 1982 1499 109.7 — — — — — — — 40.0% -0.80 1–0 — — -0.23
34 1981 1529 117.5 — — — — +118 -85 +178 22.2% -1.42 2–0 0–6 (0%) — -0.41 — — — — — — — — — — — — — — — —
35 1982 1515 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%) 97.3 +0.75 — 1598 119.7 — — — — -49 +56 -41 39.9% -0.60 17–28 (38%) 9–15 (38%) 94.7 +0.97

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.