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

Heinz Gunthardt vs Byron Bertram H2H: 1-0

Heinz Gunthardt holds a 1–0 lead over Byron Bertram in their ATP head-to-head. Across 1 main-draw meeting, Heinz Gunthardt leads 1–0 on carpet. Most recently, Heinz Gunthardt won the 1978 Springfield semifinal 7-5 6-2.

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Heinz Gunthardt
SUI Age 67 Right-Handed 180 cm / 5'11"
H2H
1 – 0
1 main draw meetings
Byron Bertram
RSA Age 73 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Heinz Gunthardt #74 7-5 6-2 Byron Bertram #66 Match data Feb 17, 1978* SF Springfield 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
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 Heinz Gunthardt Byron Bertram
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 — — — — — — — 1969 0–3 0.0% — 1,467 0 0
17 1976 1–4 20.0% #210 1,496 0 0 1970 11–11 50.0% — 1,540 0 0
18 1977 3–6 33.3% #234 1,509 0 0 1971 9–13 40.9% — 1,547 0 0
19 1978 25–25 50.0% #55 1,765 0 1 1972 2–2 50.0% — 1,536 0 0
20 1979 30–23 56.6% #51 1,815 0 1 1973 11–10 52.4% #152 1,617 0 0
21 1980 37–21 63.8% #26 1,834 0 4 1974 15–13 53.6% #156 1,655 0 0
22 1981 28–22 56.0% #38 1,813 0 4 1975 5–8 38.5% #120 1,652 0 0
23 1982 26–25 51.0% #85 1,722 0 4 1976 23–24 48.9% #57 1,737 0 0
24 1983 27–15 64.3% #25 1,853 0 5 1977 21–27 43.8% #87 1,744 0 0
25 1984 23–19 54.8% #31 1,779 0 5 1978 10–11 47.6% #92 1,668 0 0
26 1985 22–19 53.7% #36 1,820 0 5 1979 1–2 33.3% #219 1,649 0 0
27 1986 3–9 25.0% #251 1,671 0 5 1980 7–15 31.8% #150 1,570 0 0
28 1987 0–1 0.0% #954 1,664 0 5 — — — — — — —

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 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 1976 0 1 1 0.0% 1 2 3 33.3% — — — — 0 1 1 0.0% 1970 1 3 4 25.0% 2 3 5 40.0% 8 5 13 61.5% — — — —
18 1977 0 2 2 0.0% 0 2 2 0.0% 1 1 2 50.0% 2 1 3 66.7% 1971 4 5 9 44.4% 0 2 2 0.0% 5 4 9 55.6% 0 2 2 0.0%
19 1978 9 7 16 56.3% 9 12 21 42.9% 1 3 4 25.0% 6 3 9 66.7% 1972 1 1 2 50.0% — — — — 1 1 2 50.0% — — — —
20 1979 15 9 24 62.5% 13 8 21 61.9% 1 1 2 50.0% 1 5 6 16.7% 1973 3 3 6 50.0% 1 3 4 25.0% 6 3 9 66.7% 1 1 2 50.0%
21 1980 13 6 19 68.4% 11 5 16 68.8% 2 1 3 66.7% 11 9 20 55.0% 1974 3 1 4 75.0% 1 4 5 20.0% 1 1 2 50.0% 10 7 17 58.8%
22 1981 6 4 10 60.0% 15 10 25 60.0% 0 1 1 0.0% 7 7 14 50.0% 1975 1 3 4 25.0% 3 3 6 50.0% 1 1 2 50.0% 0 1 1 0.0%
23 1982 2 3 5 40.0% 16 12 28 57.1% 0 1 1 0.0% 8 9 17 47.1% 1976 7 4 11 63.6% 13 15 28 46.4% 0 1 1 0.0% 3 4 7 42.9%
24 1983 10 4 14 71.4% 17 9 26 65.4% — — — — 0 2 2 0.0% 1977 7 10 17 41.2% 4 7 11 36.4% 6 3 9 66.7% 4 7 11 36.4%
25 1984 7 6 13 53.8% 12 6 18 66.7% 0 1 1 0.0% 4 6 10 40.0% 1978 0 3 3 0.0% 0 1 1 0.0% 0 1 1 0.0% 10 6 16 62.5%
26 1985 9 7 16 56.3% 6 5 11 54.5% 4 1 5 80.0% 3 6 9 33.3% 1979 0 1 1 0.0% — — — — — — — — 1 1 2 50.0%
27 1986 0 1 1 0.0% 1 5 6 16.7% 1 1 2 50.0% 1 2 3 33.3% 1980 4 6 10 40.0% 0 3 3 0.0% 1 4 5 20.0% 2 2 4 50.0%
28 1987 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 71 51 122 58.2% 101 76 177 57.1% 10 11 21 47.6% 43 51 94 45.7% — 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 Heinz Gunthardt 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 1976 1497 106.8 — — — — — +44 — 27.3% -2.09 0–1 0–1 — -0.14 1970 1541 119.6 — — — — -55 -40 +104 49.1% -0.21 0–1 — — +0.86
18 1977 1510 115.1 — — — — +44 — — 40.0% -0.60 0–2 1–1 — +0.49 1971 1547 108.9 — — — — -39 — +97 47.5% -0.13 2–7 (22%) 3–2 (60%) — +2.12
19 1978 1766 146.9 — — — — +3 -145 -225 48.8% -0.21 10–7 (59%) 9–7 (56%) — -3.10 1972 1536 105.5 — — — — — — — 54.5% +1.27 — 0–1 — +0.31
20 1979 1815 145.2 — — — — -9 -69 — 54.6% +0.22 11–8 (58%) 11–6 (65%) — -1.34 1973 1618 113.6 — — — — +1 -147 +39 49.0% -0.12 5–3 (63%) 2–2 (50%) — +1.62
21 1980 1835 148.3 — — — — +31 -59 -191 59.5% +0.48 12–8 (60%) 11–5 (69%) — -2.27 1974 1655 122.3 — — — — +78 -202 — 53.2% +0.08 5–3 (63%) 5–2 (71%) — +2.72
22 1981 1813 148.5 — — — — -9 +4 — 53.1% +0.19 8–4 (67%) 8–6 (57%) — -2.56 1975 1653 123.3 — — — — +13 -136 — 44.1% -0.26 2–3 (40%) 3–2 (60%) — -0.16
23 1982 1722 150.4 — — — — +6 +108 — 50.0% +0.01 5–3 (63%) 8–8 (50%) — -3.00 1976 1737 135.3 — — — — +19 -143 — 48.7% -0.04 10–8 (56%) 5–6 (45%) — -0.81
24 1983 1853 151.4 — — — — -33 0 — 59.8% +0.76 10–9 (53%) 5–9 (36%) — -0.24 1977 1745 136.0 — — — — -14 -174 +50 43.4% -0.53 11–5 (69%) 4–7 (36%) — -2.84
25 1984 1779 140.1 — — — — -19 +105 — 50.5% +0.08 9–3 (75%) 10–13 (43%) — -0.50 1978 1668 116.8 — — — — +30 — — 45.7% -0.35 2–1 (67%) 3–1 (75%) — +3.30
26 1985 1820 135.6 — — — — -43 -26 -105 50.0% +0.11 11–6 (65%) 6–11 (35%) — 0.00 1979 1650 106.6 — — — — +23 — — 28.6% -0.86 1–0 0–1 — +0.39
27 1986 1672 117.2 — — — — +63 +24 — 38.2% -0.35 0–4 (0%) 2–7 (22%) — +0.03 1980 1570 124.2 — — — — +66 -71 +169 38.9% -0.57 2–5 (29%) 5–6 (45%) — -0.40
28 1987 1665 110.5 — — — — — — — 33.3% -0.67 0–1 — — -0.32 — — — — — — — — — — — — — — — —
Career — 1970 150.7 — — — — -3 -2 -167 52.3% +0.15 76–56 (58%) 71–74 (49%) 103.5 -3.13 — 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.