H2H data updated: 2026-08-31 00:00 UTC

J. Mandarino vs Byron Bertram H2H: 1-0

J. Mandarino holds a 1–0 lead over Byron Bertram in their ATP head-to-head. Across 1 main-draw meeting, J. Mandarino leads 1–0 on hard courts. Most recently, J. Mandarino won the 1971 Salisbury round of 64 6-1 6-4.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

J. Mandarino
BRA Age 85 Right-Handed 173 cm / 5'8"
H2H
1 – 0
1 main draw meetings
Byron Bertram
RSA Age 73 Right-Handed

H2H Match Log

WinnerScoreLoserMatch DataDateRoundTournamentCategorySurface
J. Mandarino 6-1 6-4 Byron Bertram Match data Feb 23, 1971* R64 Salisbury 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
J. Mandarino #793 #81 0 1,716 86 99 46.5% 0 0 0 0 0 0
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 J. Mandarino Byron Bertram
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
18 — — — — — — — 1971 9–13 40.9% — 1,547 0 0
19 — — — — — — — 1972 2–2 50.0% — 1,536 0 0
20 — — — — — — — 1973 11–10 52.4% #152 1,617 0 0
21 — — — — — — — 1974 15–13 53.6% #156 1,655 0 0
22 — — — — — — — 1975 5–8 38.5% #120 1,652 0 0
23 — — — — — — — 1976 23–24 48.9% #57 1,737 0 0
24 — — — — — — — 1977 21–27 43.8% #87 1,744 0 0
25 — — — — — — — 1978 10–11 47.6% #92 1,668 0 0
26 — — — — — — — 1979 1–2 33.3% #219 1,649 0 0
27 1968 25–14 64.1% — 1,693 0 0 1980 7–15 31.8% #150 1,570 0 0
28 1969 10–12 45.5% — 1,595 0 0 — — — — — — —
29 1970 5–6 45.5% — 1,627 0 0 — — — — — — —
30 1971 11–9 55.0% — 1,645 0 0 — — — — — — —
31 1972 8–6 57.1% — 1,682 0 0 — — — — — — —
32 1973 9–19 32.1% #104 1,646 0 0 — — — — — — —
33 1974 6–10 37.5% #129 1,621 0 0 — — — — — — —
34 1975 8–12 40.0% #120 1,565 0 0 — — — — — — —
35 1976 4–9 30.8% #180 1,529 0 0 — — — — — — —
36 1977 0–2 0.0% #253 1,493 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 J. Mandarino 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 — — — — — — — — — — — — — — — — — 1970 1 3 4 25.0% 2 3 5 40.0% 8 5 13 61.5% — — — —
18 — — — — — — — — — — — — — — — — — 1971 4 5 9 44.4% 0 2 2 0.0% 5 4 9 55.6% 0 2 2 0.0%
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%
21 — — — — — — — — — — — — — — — — — 1974 3 1 4 75.0% 1 4 5 20.0% 1 1 2 50.0% 10 7 17 58.8%
22 — — — — — — — — — — — — — — — — — 1975 1 3 4 25.0% 3 3 6 50.0% 1 1 2 50.0% 0 1 1 0.0%
23 — — — — — — — — — — — — — — — — — 1976 7 4 11 63.6% 13 15 28 46.4% 0 1 1 0.0% 3 4 7 42.9%
24 — — — — — — — — — — — — — — — — — 1977 7 10 17 41.2% 4 7 11 36.4% 6 3 9 66.7% 4 7 11 36.4%
25 — — — — — — — — — — — — — — — — — 1978 0 3 3 0.0% 0 1 1 0.0% 0 1 1 0.0% 10 6 16 62.5%
26 — — — — — — — — — — — — — — — — — 1979 0 1 1 0.0% — — — — — — — — 1 1 2 50.0%
27 1968 6 4 10 60.0% 17 9 26 65.4% 2 1 3 66.7% — — — — 1980 4 6 10 40.0% 0 3 3 0.0% 1 4 5 20.0% 2 2 4 50.0%
28 1969 0 3 3 0.0% 10 5 15 66.7% 0 2 2 0.0% 0 2 2 0.0% — — — — — — — — — — — — — — — — —
29 1970 2 2 4 50.0% 1 3 4 25.0% 2 1 3 66.7% — — — — — — — — — — — — — — — — — — — — —
30 1971 5 3 8 62.5% 4 4 8 50.0% 2 2 4 50.0% — — — — — — — — — — — — — — — — — — — — —
31 1972 1 1 2 50.0% 7 3 10 70.0% 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — —
32 1973 2 5 7 28.6% 6 7 13 46.2% 0 1 1 0.0% 1 6 7 14.3% — — — — — — — — — — — — — — — — —
33 1974 0 1 1 0.0% 5 7 12 41.7% 0 1 1 0.0% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
34 1975 — — — — 8 10 18 44.4% 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — —
35 1976 — — — — 4 8 12 33.3% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
36 1977 — — — — 0 1 1 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
Career — 16 19 35 45.7% 62 57 119 52.1% 6 13 19 31.6% 2 10 12 16.7% — 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 J. Mandarino Byron Bertram
Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak Schedule Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak 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
18 — — — — — — — — — — — — — — — 1971 1547 108.9 — — — — -39 — +97 47.5% -0.13 2–7 (22%) 3–2 (60%) +2.12
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
21 — — — — — — — — — — — — — — — 1974 1655 122.3 — — — — +78 -202 — 53.2% +0.08 5–3 (63%) 5–2 (71%) +2.72
22 — — — — — — — — — — — — — — — 1975 1653 123.3 — — — — +13 -136 — 44.1% -0.26 2–3 (40%) 3–2 (60%) -0.16
23 — — — — — — — — — — — — — — — 1976 1737 135.3 — — — — +19 -143 — 48.7% -0.04 10–8 (56%) 5–6 (45%) -0.81
24 — — — — — — — — — — — — — — — 1977 1745 136.0 — — — — -14 -174 +50 43.4% -0.53 11–5 (69%) 4–7 (36%) -2.84
25 — — — — — — — — — — — — — — — 1978 1668 116.8 — — — — +30 — — 45.7% -0.35 2–1 (67%) 3–1 (75%) +3.30
26 — — — — — — — — — — — — — — — 1979 1650 106.6 — — — — +23 — — 28.6% -0.86 1–0 0–1 +0.39
27 1968 1694 122.3 — — — — -84 +39 -137 61.0% +0.86 4–3 (57%) — +0.02 1980 1570 124.2 — — — — +66 -71 +169 38.9% -0.57 2–5 (29%) 5–6 (45%) -0.40
28 1969 1595 108.5 — — — — -85 +141 — 50.9% +0.22 1–3 (25%) — +2.82 — — — — — — — — — — — — — — —
29 1970 1628 121.9 — — — — -78 +78 -48 51.5% -0.06 0–2 — +0.28 — — — — — — — — — — — — — — —
30 1971 1645 115.8 — — — — -45 +50 -65 51.1% +0.08 2–1 (67%) 2–1 (67%) +0.81 — — — — — — — — — — — — — — —
31 1972 1683 116.4 — — — — — +101 — 51.1% -0.16 2–1 (67%) 3–1 (75%) +1.29 — — — — — — — — — — — — — — —
32 1973 1647 128.4 — — — — -68 +99 — 34.8% -0.82 4–4 (50%) 1–5 (17%) -1.89 — — — — — — — — — — — — — — —
33 1974 1622 120.3 — — — — — +97 — 34.2% -1.08 3–3 (50%) — -0.11 — — — — — — — — — — — — — — —
34 1975 1566 122.3 — — — — — +83 — 42.9% -0.24 3–5 (38%) 0–4 (0%) +0.94 — — — — — — — — — — — — — — —
35 1976 1529 106.7 — — — — — +56 — 33.3% -1.12 2–1 (67%) 0–2 +0.74 — — — — — — — — — — — — — — —
36 1977 1493 100.7 — — — — — — — 0.0% -3.00 — 0–1 +0.24 — — — — — — — — — — — — — — —
Career — 1716 125.0 — — — — -70 +80 -82 47.4% -0.10 21–23 (48%) 6–14 (30%) +2.92 — 1816 130.3 — — — — +20 -141 +86 46.2% -0.25 40–36 (53%) 30–30 (50%) +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.