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

John Alexander vs Thomaz Koch H2H: 1-0

John Alexander holds a 1–0 lead over Thomaz Koch in their ATP head-to-head. Across 1 main-draw meeting, John Alexander leads 1–0 on grass. Most recently, John Alexander won the 1977 Eastbourne Open round of 64 6-2 6-4.

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John Alexander
AUS Age 75 Right-Handed 190 cm / 6'3"
H2H
1 – 0
1 main draw meetings
Thomaz Koch
BRA Age 81 Left-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
John Alexander #27 6-2 6-4 Thomaz Koch #92 Match data Jun 8, 1977* R64 Eastbourne Open ATP 250 Grass

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
John Alexander #860 #8 0 2,015 567 419 57.5% 0 0 0 0 7 7
Thomaz Koch #857 #24 0 1,880 199 157 55.9% 0 0 0 0 6 6

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 John Alexander Thomaz Koch
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 1968 27–14 65.9% — 1,630 0 0 — — — — — — —
17 1969 29–21 58.0% — 1,636 0 0 — — — — — — —
18 1970 24–14 63.2% — 1,819 0 1 — — — — — — —
19 1971 44–36 55.0% — 1,816 0 1 — — — — — — —
20 1972 36–32 52.9% — 1,856 0 1 — — — — — — —
21 1973 46–30 60.5% #29 1,917 0 1 — — — — — — —
22 1974 38–23 62.3% #26 1,849 0 1 — — — — — — —
23 1975 61–24 71.8% #8 1,946 0 2 1968 29–17 63.0% — 1,672 0 1
24 1976 19–21 47.5% #47 1,841 0 2 1969 34–18 65.4% — 1,796 0 4
25 1977 48–33 59.3% #21 1,878 0 3 1970 18–15 54.5% — 1,804 0 4
26 1978 50–31 61.7% #22 1,810 0 3 1971 24–13 64.9% — 1,747 0 5
27 1979 38–28 57.6% #20 1,798 0 4 1972 19–17 52.8% — 1,706 0 6
28 1980 10–18 35.7% #100 1,686 0 4 1973 5–6 45.5% #204 1,698 0 6
29 1981 23–21 52.3% #75 1,744 0 4 1974 22–12 64.7% #24 1,863 0 6
30 1982 38–21 64.4% #31 1,792 0 6 1975 19–21 47.5% #62 1,768 0 6
31 1983 24–25 49.0% #77 1,658 0 7 1976 15–8 65.2% #58 1,815 0 6
32 1984 12–21 36.4% #142 1,565 0 7 1977 1–6 14.3% #94 1,715 0 6
33 1985 0–6 0.0% #405 1,492 0 7 — — — — — — —
34 — — — — — — — 1979 4–7 36.4% #85 1,665 0 6
35 — — — — — — — 1980 7–9 43.8% #49 1,654 0 6
36 — — — — — — — 1981 0–2 0.0% #90 1,630 0 6
37 — — — — — — — 1982 1–5 16.7% — 1,594 0 6
38 — — — — — — — 1983 1–1 50.0% #185 1,585 0 6

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 John Alexander Thomaz Koch
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 1968 0 1 1 0.0% 22 10 32 68.8% 5 3 8 62.5% — — — — — — — — — — — — — — — — — — — — —
17 1969 0 1 1 0.0% 7 7 14 50.0% 21 12 33 63.6% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
18 1970 4 1 5 80.0% 10 6 16 62.5% 6 6 12 50.0% 4 1 5 80.0% — — — — — — — — — — — — — — — — —
19 1971 21 12 33 63.6% 12 9 21 57.1% 4 5 9 44.4% 7 10 17 41.2% — — — — — — — — — — — — — — — — —
20 1972 11 10 21 52.4% 9 5 14 64.3% 6 3 9 66.7% 10 14 24 41.7% — — — — — — — — — — — — — — — — —
21 1973 8 6 14 57.1% 14 11 25 56.0% 3 3 6 50.0% 21 10 31 67.7% — — — — — — — — — — — — — — — — —
22 1974 12 5 17 70.6% 13 6 19 68.4% 9 5 14 64.3% 4 7 11 36.4% — — — — — — — — — — — — — — — — —
23 1975 13 3 16 81.3% 20 8 28 71.4% 6 3 9 66.7% 22 10 32 68.8% 1968 9 5 14 64.3% 18 9 27 66.7% 1 2 3 33.3% 1 1 2 50.0%
24 1976 3 5 8 37.5% 9 7 16 56.3% 2 2 4 50.0% 5 7 12 41.7% 1969 12 6 18 66.7% 12 3 15 80.0% 1 4 5 20.0% 9 5 14 64.3%
25 1977 4 5 9 44.4% 19 6 25 76.0% 18 8 26 69.2% 7 14 21 33.3% 1970 12 7 19 63.2% — — — — 1 2 3 33.3% 5 6 11 45.5%
26 1978 2 5 7 28.6% 24 10 34 70.6% 18 6 24 75.0% 6 10 16 37.5% 1971 6 4 10 60.0% 6 3 9 66.7% 5 3 8 62.5% 7 3 10 70.0%
27 1979 12 5 17 70.6% 13 8 21 61.9% 6 6 12 50.0% 7 9 16 43.8% 1972 4 5 9 44.4% 2 4 6 33.3% 7 3 10 70.0% 6 5 11 54.5%
28 1980 4 5 9 44.4% 3 2 5 60.0% 1 3 4 25.0% 2 8 10 20.0% 1973 4 4 8 50.0% 1 1 2 50.0% 0 1 1 0.0% — — — —
29 1981 7 9 16 43.8% 8 6 14 57.1% 7 5 12 58.3% 1 1 2 50.0% 1974 4 2 6 66.7% 12 7 19 63.2% 3 2 5 60.0% 3 1 4 75.0%
30 1982 6 5 11 54.5% 10 7 17 58.8% 16 5 21 76.2% 6 4 10 60.0% 1975 1 4 5 20.0% 12 11 23 52.2% 0 2 2 0.0% 6 4 10 60.0%
31 1983 7 5 12 58.3% 11 9 20 55.0% 2 6 8 25.0% 4 5 9 44.4% 1976 3 1 4 75.0% 4 4 8 50.0% — — — — 8 3 11 72.7%
32 1984 4 6 10 40.0% 4 5 9 44.4% 3 7 10 30.0% 1 3 4 25.0% 1977 0 2 2 0.0% 1 1 2 50.0% 0 1 1 0.0% 0 2 2 0.0%
33 1985 0 3 3 0.0% 0 1 1 0.0% 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — —
34 — — — — — — — — — — — — — — — — — 1979 1 3 4 25.0% 3 4 7 42.9% — — — — — — — —
35 — — — — — — — — — — — — — — — — — 1980 0 1 1 0.0% 3 4 7 42.9% 1 3 4 25.0% 3 1 4 75.0%
36 — — — — — — — — — — — — — — — — — 1981 0 1 1 0.0% 0 1 1 0.0% — — — — — — — —
37 — — — — — — — — — — — — — — — — — 1982 — — — — 1 3 4 25.0% — — — — 0 2 2 0.0%
38 — — — — — — — — — — — — — — — — — 1983 1 1 2 50.0% — — — — — — — — — — — —
Career — 118 92 210 56.2% 208 123 331 62.8% 133 90 223 59.6% 108 114 222 48.6% — 57 46 103 55.3% 75 55 130 57.7% 19 23 42 45.2% 48 33 81 59.3%

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 John Alexander Thomaz Koch
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 1968 1630 115.5 — — — — — +31 -45 58.8% +0.55 5–3 (63%) — — -0.25 — — — — — — — — — — — — — — — —
17 1969 1636 120.9 — — — — -112 +1 +83 58.9% +0.61 5–8 (38%) — — +3.75 — — — — — — — — — — — — — — — —
18 1970 1820 138.4 — — — — -87 -42 -115 59.1% +0.62 6–6 (50%) 2–1 (67%) — +1.24 — — — — — — — — — — — — — — — —
19 1971 1817 144.4 — — — — -5 +9 -82 55.2% +0.33 7–16 (30%) 18–12 (60%) — -3.21 — — — — — — — — — — — — — — — —
20 1972 1856 153.5 — — — — -29 +48 -73 53.7% +0.51 13–16 (45%) 13–24 (35%) — -8.33 — — — — — — — — — — — — — — — —
21 1973 1917 150.8 — — — — +39 -78 -95 57.3% +0.44 13–12 (52%) 19–14 (58%) — -3.88 — — — — — — — — — — — — — — — —
22 1974 1850 146.4 — — — — +27 +47 +21 60.4% +0.86 9–8 (53%) 12–14 (46%) — +0.21 — — — — — — — — — — — — — — — —
23 1975 1946 155.4 — — — — +66 +20 -94 66.4% +1.04 15–9 (63%) 23–11 (68%) — -0.90 1968 1672 129.3 — — — — -67 +38 -163 61.0% +1.12 5–9 (36%) — — +0.27
24 1976 1841 150.1 — — — — +55 +53 -1 48.4% -0.02 5–7 (42%) 8–12 (40%) — -2.95 1969 1796 127.3 — — — — +69 +56 -315 60.8% +0.65 10–7 (59%) — — +3.64
25 1977 1878 156.4 — — — — -38 +45 +16 58.5% +0.69 13–18 (42%) 16–15 (52%) — -1.53 1970 1804 127.6 — — — — +60 — — 53.9% +0.49 9–1 (90%) 0–2 — +1.66
26 1978 1810 149.4 — — — — -79 +125 +104 58.6% +0.69 15–14 (52%) 10–14 (42%) — +2.66 1971 1748 129.9 — — — — +105 +80 -167 65.2% +0.90 3–6 (33%) 7–0 (100%) — +4.08
27 1979 1799 156.8 — — — — +64 +143 -3 53.0% +0.25 15–10 (60%) 15–13 (54%) — -3.64 1972 1706 128.0 — — — — +63 +56 -87 50.6% +0.08 3–6 (33%) 5–6 (45%) — +1.16
28 1980 1687 138.0 — — — — +72 +209 +52 38.8% -0.58 4–5 (44%) 7–8 (47%) — -0.32 1973 1698 118.0 — — — — +46 — — 52.0% -0.12 1–2 (33%) 3–0 (100%) — -0.13
29 1981 1744 136.6 — — — — -49 +128 0 52.7% +0.29 7–8 (47%) 9–11 (45%) — +0.63 1974 1863 142.6 — — — — -34 -6 -203 61.5% +0.43 5–5 (50%) 7–2 (78%) — -2.09
30 1982 1792 141.1 — — — — -49 +33 +52 57.6% +0.56 17–7 (71%) 13–14 (48%) — +0.78 1975 1769 140.3 — — — — +80 +16 — 49.5% +0.08 9–8 (53%) 4–5 (44%) — -1.45
31 1983 1658 134.7 — — — — +55 +150 +81 47.5% +0.09 7–5 (58%) 10–14 (42%) — +1.71 1976 1816 127.2 — — — — +53 -51 — 60.7% +0.64 5–2 (71%) 3–3 (50%) — +3.43
32 1984 1565 130.2 — — — — +79 +244 +37 39.0% -0.49 5–6 (45%) 6–10 (38%) — -0.48 1977 1715 108.6 — — — — +35 — — 31.8% -1.27 1–3 (25%) 1–1 — +0.02
33 1985 1493 102.7 — — — — +110 — — 13.3% -2.13 0–1 1–2 (33%) — -0.02 — — — — — — — — — — — — — — — —
34 — — — — — — — — — — — — — — — — 1979 1665 115.2 — — — — +30 +52 — 42.3% -0.85 1–3 (25%) 1–0 — +0.07
35 — — — — — — — — — — — — — — — — 1980 1654 135.1 — — — — +61 +52 -47 46.3% -0.24 1–3 (25%) 3–2 (60%) — -0.22
36 — — — — — — — — — — — — — — — — 1981 1630 99.5 — — — — — — — 0.0% -2.75 — — — -0.20
37 — — — — — — — — — — — — — — — — 1982 1595 108.2 — — — — — +58 — 21.4% -2.21 0–1 0–1 — -0.55
38 — — — — — — — — — — — — — — — — 1983 1586 102.5 — — — — — — — 50.0% +0.75 — — — +0.52
Career — 2016 150.6 — — — — +12 +56 +17 55.6% +0.46 161–159 (50%) 182–189 (49%) 95.7 -1.49 — 1881 136.9 — — — — +50 +30 -156 55.5% +0.38 53–56 (49%) 34–22 (61%) 101.5 +2.93

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.