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

Byron Bertram vs John Muller H2H: 1-0

Byron Bertram holds a 1–0 lead over John Muller in their ATP head-to-head. Across 1 main-draw meeting, Byron Bertram leads 1–0 on hard courts. Most recently, Byron Bertram won the 1975 South African Open round of 64 6-3 1-6 6-1.

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

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Byron Bertram 6-3 1-6 6-1 John Muller Match data Nov 19, 1975* R64 South African 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
Byron Bertram #150 #57 0 1,815 115 139 45.3% 0 0 0 0 0 0
John Muller #423 #229 0 1,517 2 4 33.3% 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.

Byron Bertram John Muller
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
1969 0–3 0.0% — 1,467 0 0 1975 0–1 0.0% #373 1,490 0 0
1970 11–11 50.0% — 1,540 0 0 1976 1–0 100.0% #229 1,510 0 0
1971 9–13 40.9% — 1,547 0 0 1977 0–2 0.0% #240 1,501 0 0
1972 2–2 50.0% — 1,536 0 0 1980 1–1 50.0% #423 1,506 0 0
1973 11–10 52.4% #152 1,617 0 0 — — — — — — —
1974 15–13 53.6% #156 1,655 0 0 — — — — — — —
1975 5–8 38.5% #120 1,652 0 0 — — — — — — —
1976 23–24 48.9% #57 1,737 0 0 — — — — — — —
1977 21–27 43.8% #87 1,744 0 0 — — — — — — —
1978 10–11 47.6% #92 1,668 0 0 — — — — — — —
1979 1–2 33.3% #219 1,649 0 0 — — — — — — —
1980 7–15 31.8% #150 1,570 0 0 — — — — — — —

Surface Results by Career Season

Rows are aligned in career order because complete birth data is unavailable. 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.

Byron Bertram John Muller
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 %
1969 0 3 3 0.0% — — — — — — — — — — — — 1975 0 1 1 0.0% — — — — — — — — — — — —
1970 1 3 4 25.0% 2 3 5 40.0% 8 5 13 61.5% — — — — 1976 1 0 1 100.0% — — — — — — — — — — — —
1971 4 5 9 44.4% 0 2 2 0.0% 5 4 9 55.6% 0 2 2 0.0% 1977 0 2 2 0.0% — — — — — — — — — — — —
1972 1 1 2 50.0% — — — — 1 1 2 50.0% — — — — 1980 1 1 2 50.0% — — — — — — — — — — — —
1973 3 3 6 50.0% 1 3 4 25.0% 6 3 9 66.7% 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% — — — — — — — — — — — — — — — — —
1975 1 3 4 25.0% 3 3 6 50.0% 1 1 2 50.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
1976 7 4 11 63.6% 13 15 28 46.4% 0 1 1 0.0% 3 4 7 42.9% — — — — — — — — — — — — — — — — —
1977 7 10 17 41.2% 4 7 11 36.4% 6 3 9 66.7% 4 7 11 36.4% — — — — — — — — — — — — — — — — —
1978 0 3 3 0.0% 0 1 1 0.0% 0 1 1 0.0% 10 6 16 62.5% — — — — — — — — — — — — — — — — —
1979 0 1 1 0.0% — — — — — — — — 1 1 2 50.0% — — — — — — — — — — — — — — — — —
1980 4 6 10 40.0% 0 3 3 0.0% 1 4 5 20.0% 2 2 4 50.0% — — — — — — — — — — — — — — — — —
Career 31 43 74 41.9% 24 41 65 36.9% 29 24 53 54.7% 31 31 62 50.0% Career 2 4 6 33.3% — — — — — — — — — — — —

Advanced Statistics Comparison by Career Season

Rows are aligned in career order because complete birth data is unavailable. 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.

Byron Bertram John Muller
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
1969 1467 97.7 — — — — +26 — — 20.0% -2.20 — — — -0.10 1975 1490 100.9 — — — — — — — 33.3% -1.00 0–1 — — +0.04
1970 1541 119.6 — — — — -55 -40 +104 49.1% -0.21 0–1 — — +0.86 1976 1511 103.7 — — — — — — — 100.0% +2.50 — — — +0.08
1971 1547 108.9 — — — — -39 — +97 47.5% -0.13 2–7 (22%) 3–2 (60%) — +2.12 1977 1501 102.1 — — — — — — — 0.0% -4.75 — — — -0.20
1972 1536 105.5 — — — — — — — 54.5% +1.27 — 0–1 — +0.31 1980 1506 106.5 — — — — — — — 50.0% +1.00 — — — +0.34
1973 1618 113.6 — — — — +1 -147 +39 49.0% -0.12 5–3 (63%) 2–2 (50%) — +1.62 — — — — — — — — — — — — — — — —
1974 1655 122.3 — — — — +78 -202 — 53.2% +0.08 5–3 (63%) 5–2 (71%) — +2.72 — — — — — — — — — — — — — — — —
1975 1653 123.3 — — — — +13 -136 — 44.1% -0.26 2–3 (40%) 3–2 (60%) — -0.16 — — — — — — — — — — — — — — — —
1976 1737 135.3 — — — — +19 -143 — 48.7% -0.04 10–8 (56%) 5–6 (45%) — -0.81 — — — — — — — — — — — — — — — —
1977 1745 136.0 — — — — -14 -174 +50 43.4% -0.53 11–5 (69%) 4–7 (36%) — -2.84 — — — — — — — — — — — — — — — —
1978 1668 116.8 — — — — +30 — — 45.7% -0.35 2–1 (67%) 3–1 (75%) — +3.30 — — — — — — — — — — — — — — — —
1979 1650 106.6 — — — — +23 — — 28.6% -0.86 1–0 0–1 — +0.39 — — — — — — — — — — — — — — — —
1980 1570 124.2 — — — — +66 -71 +169 38.9% -0.57 2–5 (29%) 5–6 (45%) — -0.40 — — — — — — — — — — — — — — — —
Career 1816 130.3 — — — — +20 -141 +86 46.2% -0.25 40–36 (53%) 30–30 (50%) 106.0 +2.79 Career 1517 105.9 — — — — — — — 38.5% -1.00 0–1 — — +4.33

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.