H2H data updated: 2026-09-02 00:00 UTC

Byron Bertram vs John Marks H2H: 1-0

Byron Bertram holds a 1–0 lead over John Marks in their ATP head-to-head. Across 1 main-draw meeting, Byron Bertram leads 1–0 on clay. Most recently, Byron Bertram won the 1977 Swedish Open round of 32 6-3 0-6 7-6.

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Byron Bertram
RSA Age 73 Right-Handed
H2H
1 – 0
1 main draw meetings
John Marks
AUS Age 73 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Byron Bertram #59 6-3 0-6 7-6 John Marks #174 Match data Jul 6, 1977* R32 Swedish Open ATP 250 Clay

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
Byron Bertram #150 #57 0 1,815 115 139 45.3% 0 0 0 0 0 0
John Marks #223 #60 0 1,632 30 81 27.0% 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 Byron Bertram John Marks
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 1970 1–1 50.0% — 1,486 0 0
18 1971 9–13 40.9% — 1,547 0 0 1971 1–2 33.3% — 1,471 0 0
19 1972 2–2 50.0% — 1,536 0 0 — — — — — — —
20 1973 11–10 52.4% #152 1,617 0 0 1973 0–1 0.0% — 1,454 0 0
21 1974 15–13 53.6% #156 1,655 0 0 1974 1–3 25.0% — 1,434 0 0
22 1975 5–8 38.5% #120 1,652 0 0 1975 5–1 83.3% #330 1,554 0 0
23 1976 23–24 48.9% #57 1,737 0 0 1976 3–15 16.7% #165 1,438 0 0
24 1977 21–27 43.8% #87 1,744 0 0 1977 4–13 23.5% #174 1,434 0 0
25 1978 10–11 47.6% #92 1,668 0 0 1978 9–16 36.0% #63 1,629 0 0
26 1979 1–2 33.3% #219 1,649 0 0 1979 4–26 13.3% #115 1,457 0 0
27 1980 7–15 31.8% #150 1,570 0 0 1980 2–3 40.0% #223 1,460 0 0

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 Byron Bertram John Marks
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% — — — — 1970 — — — — — — — — 1 1 2 50.0% — — — —
18 1971 4 5 9 44.4% 0 2 2 0.0% 5 4 9 55.6% 0 2 2 0.0% 1971 — — — — — — — — 1 2 3 33.3% — — — —
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% 1973 — — — — — — — — 0 1 1 0.0% — — — —
21 1974 3 1 4 75.0% 1 4 5 20.0% 1 1 2 50.0% 10 7 17 58.8% 1974 — — — — — — — — 1 3 4 25.0% — — — —
22 1975 1 3 4 25.0% 3 3 6 50.0% 1 1 2 50.0% 0 1 1 0.0% 1975 — — — — — — — — 5 1 6 83.3% — — — —
23 1976 7 4 11 63.6% 13 15 28 46.4% 0 1 1 0.0% 3 4 7 42.9% 1976 1 6 7 14.3% 2 5 7 28.6% 0 4 4 0.0% — — — —
24 1977 7 10 17 41.2% 4 7 11 36.4% 6 3 9 66.7% 4 7 11 36.4% 1977 0 2 2 0.0% 1 5 6 16.7% 3 6 9 33.3% — — — —
25 1978 0 3 3 0.0% 0 1 1 0.0% 0 1 1 0.0% 10 6 16 62.5% 1978 0 2 2 0.0% 2 7 9 22.2% 7 6 13 53.8% 0 1 1 0.0%
26 1979 0 1 1 0.0% — — — — — — — — 1 1 2 50.0% 1979 1 5 6 16.7% 1 9 10 10.0% 2 8 10 20.0% 0 4 4 0.0%
27 1980 4 6 10 40.0% 0 3 3 0.0% 1 4 5 20.0% 2 2 4 50.0% 1980 2 1 3 66.7% — — — — 0 1 1 0.0% 0 1 1 0.0%
Career — 31 43 74 41.9% 24 41 65 36.9% 29 24 53 54.7% 31 31 62 50.0% — 4 16 20 20.0% 6 26 32 18.8% 20 33 53 37.7% 0 6 6 0.0%

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 Byron Bertram John Marks
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 1970 1486 100.6 — — — — — — — 0.0% -2.00 — — — +0.07
18 1971 1547 108.9 — — — — -39 — +97 47.5% -0.13 2–7 (22%) 3–2 (60%) — +2.12 1971 1471 103.7 — — — — — — +31 37.5% -0.63 — 1–2 (33%) — +0.18
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 1973 1454 — — — — — — — — — — — — — +0.15
21 1974 1655 122.3 — — — — +78 -202 — 53.2% +0.08 5–3 (63%) 5–2 (71%) — +2.72 1974 1434 96.4 — — — — — — +7 30.0% -1.60 1–1 1–0 — +0.27
22 1975 1653 123.3 — — — — +13 -136 — 44.1% -0.26 2–3 (40%) 3–2 (60%) — -0.16 1975 1554 121.6 — — — — — — +44 62.5% +0.12 4–0 (100%) 2–0 — +0.10
23 1976 1737 135.3 — — — — +19 -143 — 48.7% -0.04 10–8 (56%) 5–6 (45%) — -0.81 1976 1439 102.4 — — — — +49 +81 +84 27.3% -1.68 0–4 (0%) 1–1 — +1.65
24 1977 1745 136.0 — — — — -14 -174 +50 43.4% -0.53 11–5 (69%) 4–7 (36%) — -2.84 1977 1434 105.6 — — — — — +63 +34 30.4% -1.52 3–4 (43%) 2–3 (40%) — +0.56
25 1978 1668 116.8 — — — — +30 — — 45.7% -0.35 2–1 (67%) 3–1 (75%) — +3.30 1978 1630 130.5 — — — — -206 -118 +65 35.9% -0.81 3–0 (100%) 0–6 (0%) — -0.89
26 1979 1650 106.6 — — — — +23 — — 28.6% -0.86 1–0 0–1 — +0.39 1979 1457 112.2 — — — — -86 -22 +140 19.4% -2.11 2–5 (29%) 1–6 (14%) — +0.37
27 1980 1570 124.2 — — — — +66 -71 +169 38.9% -0.57 2–5 (29%) 5–6 (45%) — -0.40 1980 1460 100.7 — — — — -68 — — 41.7% -0.50 1–1 — — +0.91
Career — 1816 130.3 — — — — +20 -141 +86 46.2% -0.25 40–36 (53%) 30–30 (50%) 106.0 +2.79 — 1632 116.6 — — — — -59 -11 +67 30.7% -1.37 14–15 (48%) 8–18 (31%) 101.0 +3.06

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.