H2H data updated: 2026-10-20 00:00 UTC

Thomaz Koch vs Zan Guerry H2H: 2-0

Thomaz Koch holds a 2–0 lead over Zan Guerry in their ATP head-to-head. Across 2 main-draw meetings, Thomaz Koch leads 1–0 on clay and 1–0 on hard courts. Most recently, Thomaz Koch won the 1969 Barcelona Open round of 64 5-7 0-6 6-4 6-3 6-3.

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Thomaz Koch
BRA Age 81 Left-Handed
H2H
2 – 0
2 main-draw meetings
Zan Guerry
USA Age 77 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Thomaz Koch 5-7 0-6 6-4 6-3 6-3 Zan Guerry Match data May 14, 1969* R64 Barcelona Open ATP 250 Clay
Thomaz Koch 6-1 7-5 Zan Guerry Match data Feb 13, 1969* R32 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
Thomaz Koch #857 #24 0 1,879 199 157 55.9% 0 0 0 0 6 6
Zan Guerry #490 #98 0 1,598 41 76 35.0% 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 Thomaz Koch Zan Guerry
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
19 — — — — — — — 1968 4–6 40.0% — 1,476 0 0
20 — — — — — — — 1969 8–10 44.4% — 1,526 0 0
21 — — — — — — — 1970 1–3 25.0% — 1,509 0 0
22 — — — — — — — 1971 4–6 40.0% — 1,511 0 0
23 1968 29–17 63.0% — 1,672 0 1 1972 5–7 41.7% — 1,513 0 0
24 1969 34–18 65.4% — 1,796 0 4 1973 3–5 37.5% #203 1,515 0 0
25 1970 18–15 54.5% — 1,801 0 4 1974 1–1 50.0% #228 1,536 0 0
26 1971 24–13 64.9% — 1,746 0 5 1975 2–2 50.0% #205 1,565 0 0
27 1972 19–17 52.8% — 1,705 0 6 1976 0–6 0.0% #176 1,500 0 0
28 1973 5–6 45.5% #204 1,697 0 6 1977 8–16 33.3% #98 1,562 0 0
29 1974 22–12 64.7% #24 1,862 0 6 1978 2–7 22.2% #279 1,522 0 0
30 1975 19–21 47.5% #62 1,768 0 6 1979 1–3 25.0% #326 1,517 0 0
31 1976 15–8 65.2% #58 1,815 0 6 1980 1–2 33.3% — 1,483 0 0
32 1977 1–6 14.3% #94 1,715 0 6 1981 0–1 0.0% — 1,477 0 0
33 — — — — — — — 1982 1–1 50.0% — 1,498 0 0
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 Thomaz Koch Zan Guerry
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 %
19 — — — — — — — — — — — — — — — — — 1968 — — — — 3 3 6 50.0% 1 3 4 25.0% — — — —
20 — — — — — — — — — — — — — — — — — 1969 0 1 1 0.0% 6 5 11 54.5% 2 4 6 33.3% — — — —
21 — — — — — — — — — — — — — — — — — 1970 0 1 1 0.0% 1 2 3 33.3% — — — — — — — —
22 — — — — — — — — — — — — — — — — — 1971 2 2 4 50.0% 2 3 5 40.0% 0 1 1 0.0% — — — —
23 1968 9 5 14 64.3% 18 9 27 66.7% 1 2 3 33.3% 1 1 2 50.0% 1972 1 2 3 33.3% 4 4 8 50.0% 0 1 1 0.0% — — — —
24 1969 12 6 18 66.7% 12 3 15 80.0% 1 4 5 20.0% 9 5 14 64.3% 1973 2 4 6 33.3% — — — — 1 1 2 50.0% — — — —
25 1970 12 7 19 63.2% — — — — 1 2 3 33.3% 5 6 11 45.5% 1974 — — — — 1 1 2 50.0% — — — — — — — —
26 1971 6 4 10 60.0% 6 3 9 66.7% 5 3 8 62.5% 7 3 10 70.0% 1975 1 1 2 50.0% 1 1 2 50.0% — — — — — — — —
27 1972 4 5 9 44.4% 2 4 6 33.3% 7 3 10 70.0% 6 5 11 54.5% 1976 0 2 2 0.0% 0 3 3 0.0% — — — — 0 1 1 0.0%
28 1973 4 4 8 50.0% 1 1 2 50.0% 0 1 1 0.0% — — — — 1977 0 3 3 0.0% 8 11 19 42.1% — — — — 0 2 2 0.0%
29 1974 4 2 6 66.7% 12 7 19 63.2% 3 2 5 60.0% 3 1 4 75.0% 1978 — — — — 2 3 5 40.0% — — — — 0 4 4 0.0%
30 1975 1 4 5 20.0% 12 11 23 52.2% 0 2 2 0.0% 6 4 10 60.0% 1979 0 1 1 0.0% 1 2 3 33.3% — — — — — — — —
31 1976 3 1 4 75.0% 4 4 8 50.0% — — — — 8 3 11 72.7% 1980 — — — — 0 1 1 0.0% 1 1 2 50.0% — — — —
32 1977 0 2 2 0.0% 1 1 2 50.0% 0 1 1 0.0% 0 2 2 0.0% 1981 — — — — 0 1 1 0.0% — — — — — — — —
33 — — — — — — — — — — — — — — — — — 1982 — — — — 1 1 2 50.0% — — — — — — — —
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 — 57 46 103 55.3% 75 55 130 57.7% 19 23 42 45.2% 48 33 81 59.3% — 6 17 23 26.1% 30 41 71 42.3% 5 11 16 31.2% 0 7 7 0.0%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. 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 Thomaz Koch Zan Guerry
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
19 — — — — — — — — — — — — — — — — 1968 1477 99.0 — — — — — +41 -13 41.7% -0.50 1–1 — — -0.13
20 — — — — — — — — — — — — — — — — 1969 1527 112.6 — — — — — +58 -60 47.9% -0.10 3–3 (50%) — — -0.60
21 — — — — — — — — — — — — — — — — 1970 1509 100.8 — — — — — +67 — 36.4% -1.36 1–2 (33%) — — +0.06
22 — — — — — — — — — — — — — — — — 1971 1512 109.1 — — — — -8 +73 — 34.8% -0.43 2–1 (67%) 0–3 (0%) 99.0 +0.02
23 1968 1672 129.3 — — — — -67 +38 -163 61.0% +1.12 5–9 (36%) — — +0.27 1972 1513 101.7 — — — — -18 +69 — 45.5% -0.03 3–4 (43%) 3–6 (33%) 95.4 +1.00
24 1969 1796 127.3 — — — — +69 +56 -315 60.8% +0.65 10–7 (59%) — — +3.64 1973 1516 109.4 — — — — -6 — — 45.8% -0.17 2–3 (40%) 2–2 (50%) 101.5 +0.71
25 1970 1802 127.6 — — — — +61 — — 53.9% +0.49 9–1 (90%) 0–2 — +1.73 1974 1537 108.8 — — — — — — — 50.0% -0.50 — 1–0 — -0.19
26 1971 1747 130.0 — — — — +105 +84 -166 65.2% +0.90 3–6 (33%) 7–0 (100%) 100.9 +4.06 1975 1565 108.3 — — — — — — — 44.4% -0.22 1–0 0–1 — +0.08
27 1972 1706 127.9 — — — — +63 +57 -87 50.6% +0.08 3–6 (33%) 5–6 (45%) 94.9 +1.15 1976 1500 112.0 — — — — -21 +41 — 14.3% -1.71 0–1 0–1 — +0.12
28 1973 1698 118.0 — — — — +46 — — 52.0% -0.12 1–2 (33%) 3–0 (100%) — -0.13 1977 1563 135.9 — — — — -120 +42 — 39.3% -0.73 2–6 (25%) 1–2 (33%) — -0.82
29 1974 1863 142.5 — — — — -34 -5 -203 61.5% +0.43 5–5 (50%) 7–2 (78%) 104.7 -2.08 1978 1523 109.4 — — — — -107 +79 — 37.5% -1.04 1–5 (17%) 2–0 — +0.86
30 1975 1768 140.2 — — — — +80 +17 — 49.5% +0.08 9–8 (53%) 4–5 (44%) 98.9 -1.44 1979 1518 104.3 — — — — — +61 — 40.0% -0.70 0–2 — — -0.17
31 1976 1816 127.2 — — — — +53 -51 — 60.7% +0.64 5–2 (71%) 3–3 (50%) 102.5 +3.43 1980 1484 91.9 — — — — — — — 0.0% -3.75 — — — +0.48
32 1977 1715 108.5 — — — — +34 — — 31.8% -1.27 1–3 (25%) 1–1 — +0.02 1981 1478 100.2 — — — — — — — 0.0% -3.50 — — — -0.08
33 — — — — — — — — — — — — — — — — 1982 1499 109.7 — — — — — — — 40.0% -0.80 1–0 — — -0.23
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%) 98.7 -0.22 — — — — — — — — — — — — — — — —
36 1981 1630 99.5 — — — — — — — 0.0% -2.75 — — — -0.20 — — — — — — — — — — — — — — — —
37 1982 1595 108.2 — — — — — +57 — 21.4% -2.21 0–1 0–1 — -0.55 — — — — — — — — — — — — — — — —
38 1983 1586 102.5 — — — — — — — 50.0% +0.75 — — — +0.52 — — — — — — — — — — — — — — — —
Career — 1879 136.9 — — — — +50 +30 -156 55.5% +0.38 53–56 (49%) 34–22 (61%) 101.5 +2.95 — 1598 119.7 — — — — -49 +56 -41 39.9% -0.60 17–28 (38%) 9–15 (38%) 94.7 +0.97

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.