H2H data updated: 2026-09-06 00:00 UTC

Heinz Gunthardt vs John Sadri H2H: 1-0

Heinz Gunthardt holds a 1–0 lead over John Sadri in their ATP head-to-head. Across 1 main-draw meeting, Heinz Gunthardt leads 1–0 on carpet. Most recently, Heinz Gunthardt won the 1980 ABN AMRO Open quarterfinal 7-6 5-7 6-2.

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Heinz Gunthardt
SUI Age 67 Right-Handed 180 cm / 5'11"
H2H
1 – 0
1 main-draw meetings
John Sadri
USA Age 69 Right-Handed 188 cm / 6'2"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Heinz Gunthardt #51 7-6 5-7 6-2 John Sadri #19 Match data Mar 15, 1980* QF ABN AMRO 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
Heinz Gunthardt #1,013 #22 0 1,969 225 189 54.3% 0 0 0 0 5 5
John Sadri #997 #14 0 1,980 214 189 53.1% 0 0 0 0 2 2

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 Heinz Gunthardt John Sadri
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 1976 1–4 20.0% #210 1,496 0 0 — — — — — — —
18 1977 3–6 33.3% #234 1,509 0 0 — — — — — — —
19 1978 25–25 50.0% #55 1,765 0 1 1976 0–1 0.0% #360 1,498 0 0
20 1979 30–23 56.6% #51 1,815 0 1 1977 0–1 0.0% #322 1,496 0 0
21 1980 37–21 63.8% #26 1,834 0 4 1978 6–8 42.9% #84 1,564 0 0
22 1981 28–22 56.0% #38 1,813 0 4 1979 29–24 54.7% #45 1,861 0 0
23 1982 26–25 51.0% #85 1,722 0 4 1980 47–25 65.3% #15 1,939 0 1
24 1983 27–15 64.3% #25 1,853 0 5 1981 22–21 51.2% #36 1,736 0 1
25 1984 23–19 54.8% #31 1,779 0 5 1982 32–23 58.2% #38 1,737 0 2
26 1985 22–19 53.7% #36 1,820 0 5 1983 8–13 38.1% #93 1,641 0 2
27 1986 3–9 25.0% #251 1,671 0 5 1984 25–16 61.0% #29 1,811 0 2
28 1987 0–1 0.0% #954 1,664 0 5 1985 25–25 50.0% #46 1,750 0 2
29 — — — — — — — 1986 12–21 36.4% #130 1,648 0 2
30 — — — — — — — 1987 8–11 42.1% #173 1,602 0 2

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 Heinz Gunthardt John Sadri
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 %
17 1976 0 1 1 0.0% 1 2 3 33.3% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
18 1977 0 2 2 0.0% 0 2 2 0.0% 1 1 2 50.0% 2 1 3 66.7% — — — — — — — — — — — — — — — — —
19 1978 9 7 16 56.3% 9 12 21 42.9% 1 3 4 25.0% 6 3 9 66.7% 1976 — — — — 0 1 1 0.0% — — — — — — — —
20 1979 15 9 24 62.5% 13 8 21 61.9% 1 1 2 50.0% 1 5 6 16.7% 1977 — — — — — — — — — — — — 0 1 1 0.0%
21 1980 13 6 19 68.4% 11 5 16 68.8% 2 1 3 66.7% 11 9 20 55.0% 1978 3 4 7 42.9% 0 2 2 0.0% 3 2 5 60.0% — — — —
22 1981 6 4 10 60.0% 15 10 25 60.0% 0 1 1 0.0% 7 7 14 50.0% 1979 9 8 17 52.9% 5 3 8 62.5% 8 4 12 66.7% 7 9 16 43.8%
23 1982 2 3 5 40.0% 16 12 28 57.1% 0 1 1 0.0% 8 9 17 47.1% 1980 14 7 21 66.7% 0 2 2 0.0% 15 6 21 71.4% 18 10 28 64.3%
24 1983 10 4 14 71.4% 17 9 26 65.4% — — — — 0 2 2 0.0% 1981 3 5 8 37.5% 0 1 1 0.0% 8 5 13 61.5% 11 10 21 52.4%
25 1984 7 6 13 53.8% 12 6 18 66.7% 0 1 1 0.0% 4 6 10 40.0% 1982 3 6 9 33.3% 4 2 6 66.7% 10 6 16 62.5% 15 9 24 62.5%
26 1985 9 7 16 56.3% 6 5 11 54.5% 4 1 5 80.0% 3 6 9 33.3% 1983 1 2 3 33.3% — — — — 1 4 5 20.0% 6 7 13 46.2%
27 1986 0 1 1 0.0% 1 5 6 16.7% 1 1 2 50.0% 1 2 3 33.3% 1984 9 6 15 60.0% 4 2 6 66.7% 11 5 16 68.8% 1 3 4 25.0%
28 1987 0 1 1 0.0% — — — — — — — — — — — — 1985 8 10 18 44.4% — — — — 6 4 10 60.0% 11 11 22 50.0%
29 — — — — — — — — — — — — — — — — — 1986 4 10 14 28.6% 0 1 1 0.0% 3 4 7 42.9% 5 6 11 45.5%
30 — — — — — — — — — — — — — — — — — 1987 4 4 8 50.0% 1 1 2 50.0% 3 6 9 33.3% — — — —
Career — 71 51 122 58.2% 101 76 177 57.1% 10 11 21 47.6% 43 51 94 45.7% — 58 62 120 48.3% 14 15 29 48.3% 68 46 114 59.6% 74 66 140 52.9%

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 Heinz Gunthardt John Sadri
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
17 1976 1497 106.8 — — — — — +44 — 27.3% -2.09 0–1 0–1 — -0.14 — — — — — — — — — — — — — — — —
18 1977 1510 115.1 — — — — +44 — — 40.0% -0.60 0–2 1–1 — +0.49 — — — — — — — — — — — — — — — —
19 1978 1766 146.9 — — — — +3 -145 -225 48.8% -0.21 10–7 (59%) 9–7 (56%) 107.7 -3.10 1976 1499 111.1 — — — — — — — 0.0% -3.00 — — — -0.27
20 1979 1815 145.2 — — — — -9 -69 — 54.6% +0.22 11–8 (58%) 11–6 (65%) 106.3 -1.34 1977 1497 104.1 — — — — — — — 0.0% -3.00 — 0–1 — -0.07
21 1980 1835 148.3 — — — — +31 -59 -191 59.5% +0.48 12–8 (60%) 11–5 (69%) 105.9 -2.27 1978 1564 130.6 — — — — +6 — +44 50.0% +0.11 1–3 (25%) 2–2 (50%) 98.6 +0.84
22 1981 1813 148.5 — — — — -9 +4 — 53.1% +0.19 8–4 (67%) 8–6 (57%) 106.5 -2.56 1979 1861 151.0 — — — — -119 -244 -56 51.8% +0.17 11–5 (69%) 8–14 (36%) 106.7 -1.45
23 1982 1722 150.4 — — — — +6 +108 — 50.0% +0.01 5–3 (63%) 8–8 (50%) 100.4 -3.00 1980 1940 157.0 — — — — +11 — -34 62.3% +0.72 9–12 (43%) 19–16 (54%) 99.9 -5.20
24 1983 1853 151.4 — — — — -33 0 — 59.8% +0.76 10–9 (53%) 5–9 (36%) 96.3 -0.24 1981 1737 143.0 — — — — +67 — +81 48.1% +0.04 9–6 (60%) 11–12 (48%) 99.6 -1.48
25 1984 1779 140.1 — — — — -19 +105 — 50.5% +0.08 9–3 (75%) 10–13 (43%) 103.8 -0.50 1982 1738 142.8 — — — — +19 -126 +70 56.2% +0.37 11–11 (50%) 19–19 (50%) 97.0 -1.52
26 1985 1820 135.6 — — — — -43 -26 -105 50.0% +0.11 11–6 (65%) 6–11 (35%) 100.8 0.00 1983 1641 128.2 — — — — +86 — +64 39.2% -0.33 2–2 (50%) 4–8 (33%) 97.7 +1.38
27 1986 1672 117.2 — — — — +63 +24 — 38.2% -0.35 0–4 (0%) 2–7 (22%) 88.0 +0.03 1984 1812 142.4 — — — — -66 -146 +50 57.1% +0.42 7–6 (54%) 10–14 (42%) 99.4 -0.17
28 1987 1665 110.5 — — — — — — — 33.3% -0.67 0–1 — — -0.32 1985 1751 142.3 — — — — -39 — +121 49.2% -0.08 7–7 (50%) 13–14 (48%) 96.7 -2.23
29 — — — — — — — — — — — — — — — — 1986 1649 140.6 — — — — -1 — +163 42.4% -0.39 3–8 (27%) 9–10 (47%) 93.8 -1.80
30 — — — — — — — — — — — — — — — — 1987 1602 121.9 — — — — +47 — +90 44.9% -0.24 2–1 (67%) 4–2 (67%) 102.4 +0.33
Career — 1970 150.7 — — — — -3 -2 -167 52.3% +0.15 76–56 (58%) 71–74 (49%) 103.5 -3.13 — 1980 150.7 — — — — -7 -179 +46 52.1% +0.17 62–61 (50%) 99–112 (47%) 97.5 -2.90

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.