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

Jeff Borowiak vs Thomaz Koch H2H: 2-0

Jeff Borowiak holds a 2–0 lead over Thomaz Koch in their ATP head-to-head. Across 2 main-draw meetings, Jeff Borowiak leads 2–0 on clay. Most recently, Jeff Borowiak won the 1975 St. Louis round of 16 6-4 6-2.

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Jeff Borowiak
USA Age 76 Right-Handed 193 cm / 6'4"
H2H
2 – 0
2 main draw meetings
Thomaz Koch
BRA Age 81 Left-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Jeff Borowiak 6-4 6-2 Thomaz Koch Match data Apr 11, 1975* R16 St. Louis ATP 250 Clay
Jeff Borowiak 3-6 6-3 6-2 Thomaz Koch Match data Jul 24, 1974* R32 Austrian Open Kitzbühel 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
Jeff Borowiak #920 #20 0 1,958 290 304 48.8% 0 0 0 0 5 5
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 Jeff Borowiak Thomaz Koch
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
18 1968 6–10 37.5% — 1,470 0 0 — — — — — — —
19 1969 3–2 60.0% — 1,511 0 0 — — — — — — —
20 1970 6–7 46.2% — 1,564 0 0 — — — — — — —
21 1971 26–20 56.5% — 1,759 0 0 — — — — — — —
22 1972 20–28 41.7% — 1,825 0 0 — — — — — — —
23 1973 21–33 38.9% #82 1,732 0 0 1968 29–17 63.0% — 1,672 0 1
24 1974 34–26 56.7% #40 1,858 0 2 1969 34–18 65.4% — 1,796 0 4
25 1975 31–26 54.4% #48 1,807 0 2 1970 18–15 54.5% — 1,804 0 4
26 1976 18–23 43.9% #60 1,724 0 2 1971 24–13 64.9% — 1,747 0 5
27 1977 47–24 66.2% #25 1,825 0 5 1972 19–17 52.8% — 1,706 0 6
28 1978 16–25 39.0% #98 1,671 0 5 1973 5–6 45.5% #204 1,698 0 6
29 1979 5–13 27.8% #125 1,617 0 5 1974 22–12 64.7% #24 1,863 0 6
30 1980 5–5 50.0% #189 1,670 0 5 1975 19–21 47.5% #62 1,768 0 6
31 1981 18–19 48.6% #52 1,763 0 5 1976 15–8 65.2% #58 1,815 0 6
32 1982 21–20 51.2% #94 1,742 0 5 1977 1–6 14.3% #94 1,715 0 6
33 1983 13–19 40.6% #98 1,652 0 5 — — — — — — —
34 1984 0–4 0.0% #520 1,599 0 5 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 Jeff Borowiak 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 %
18 1968 4 2 6 66.7% 1 2 3 33.3% 1 5 6 16.7% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
19 1969 3 1 4 75.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
20 1970 1 1 2 50.0% 2 3 5 40.0% 3 2 5 60.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
21 1971 11 10 21 52.4% 6 5 11 54.5% 4 3 7 57.1% 5 2 7 71.4% — — — — — — — — — — — — — — — — —
22 1972 9 9 18 50.0% 1 5 6 16.7% 0 1 1 0.0% 10 13 23 43.5% — — — — — — — — — — — — — — — — —
23 1973 8 8 16 50.0% 9 12 21 42.9% 1 3 4 25.0% 3 10 13 23.1% 1968 9 5 14 64.3% 18 9 27 66.7% 1 2 3 33.3% 1 1 2 50.0%
24 1974 9 9 18 50.0% 13 11 24 54.2% 2 3 5 40.0% 10 3 13 76.9% 1969 12 6 18 66.7% 12 3 15 80.0% 1 4 5 20.0% 9 5 14 64.3%
25 1975 11 9 20 55.0% 8 10 18 44.4% 3 2 5 60.0% 9 5 14 64.3% 1970 12 7 19 63.2% — — — — 1 2 3 33.3% 5 6 11 45.5%
26 1976 3 3 6 50.0% 12 10 22 54.5% 0 2 2 0.0% 3 8 11 27.3% 1971 6 4 10 60.0% 6 3 9 66.7% 5 3 8 62.5% 7 3 10 70.0%
27 1977 7 8 15 46.7% 19 5 24 79.2% 0 2 2 0.0% 21 9 30 70.0% 1972 4 5 9 44.4% 2 4 6 33.3% 7 3 10 70.0% 6 5 11 54.5%
28 1978 1 5 6 16.7% 13 9 22 59.1% 0 3 3 0.0% 2 8 10 20.0% 1973 4 4 8 50.0% 1 1 2 50.0% 0 1 1 0.0% — — — —
29 1979 0 3 3 0.0% 2 5 7 28.6% 1 1 2 50.0% 2 4 6 33.3% 1974 4 2 6 66.7% 12 7 19 63.2% 3 2 5 60.0% 3 1 4 75.0%
30 1980 3 3 6 50.0% — — — — — — — — 2 2 4 50.0% 1975 1 4 5 20.0% 12 11 23 52.2% 0 2 2 0.0% 6 4 10 60.0%
31 1981 11 9 20 55.0% 2 3 5 40.0% 3 2 5 60.0% 2 5 7 28.6% 1976 3 1 4 75.0% 4 4 8 50.0% — — — — 8 3 11 72.7%
32 1982 4 7 11 36.4% 4 3 7 57.1% 10 6 16 62.5% 3 4 7 42.9% 1977 0 2 2 0.0% 1 1 2 50.0% 0 1 1 0.0% 0 2 2 0.0%
33 1983 1 6 7 14.3% 7 5 12 58.3% 2 4 6 33.3% 3 4 7 42.9% — — — — — — — — — — — — — — — — —
34 1984 0 1 1 0.0% 0 2 2 0.0% 0 1 1 0.0% — — — — 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 — 86 94 180 47.8% 99 91 190 52.1% 30 40 70 42.9% 75 79 154 48.7% — 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 Jeff Borowiak 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
18 1968 1471 97.5 — — — — +106 +20 -42 37.8% -0.84 0–2 — — +0.39 — — — — — — — — — — — — — — — —
19 1969 1512 107.1 — — — — +167 — — 50.0% +0.43 3–1 (75%) — — +0.31 — — — — — — — — — — — — — — — —
20 1970 1565 109.0 — — — — +89 -54 -66 46.7% -0.47 1–0 0–2 — -0.25 — — — — — — — — — — — — — — — —
21 1971 1759 131.8 — — — — +6 -154 -148 53.0% +0.15 10–5 (67%) 9–6 (60%) — -1.12 — — — — — — — — — — — — — — — —
22 1972 1826 149.5 — — — — +40 -240 — 43.2% -0.46 10–10 (50%) 9–10 (47%) — -7.30 — — — — — — — — — — — — — — — —
23 1973 1733 135.6 — — — — +29 -103 -173 43.0% -0.37 9–15 (38%) 7–10 (41%) — -4.54 1968 1672 129.3 — — — — -67 +38 -163 61.0% +1.12 5–9 (36%) — — +0.27
24 1974 1859 146.3 — — — — +25 -114 -273 56.0% +0.23 8–10 (44%) 12–6 (67%) — -4.92 1969 1796 127.3 — — — — +69 +56 -315 60.8% +0.65 10–7 (59%) — — +3.64
25 1975 1808 148.3 — — — — +64 -110 -178 53.6% +0.42 11–12 (48%) 5–9 (36%) — -5.88 1970 1804 127.6 — — — — +60 — — 53.9% +0.49 9–1 (90%) 0–2 — +1.66
26 1976 1725 143.4 — — — — +66 -6 — 47.9% -0.08 9–9 (50%) 6–8 (43%) — -2.54 1971 1748 129.9 — — — — +105 +80 -167 65.2% +0.90 3–6 (33%) 7–0 (100%) — +4.08
27 1977 1825 151.8 — — — — -12 +75 — 61.0% +0.81 14–7 (67%) 9–9 (50%) — +0.48 1972 1706 128.0 — — — — +63 +56 -87 50.6% +0.08 3–6 (33%) 5–6 (45%) — +1.16
28 1978 1672 145.7 — — — — -11 +208 -147 43.0% -0.37 3–6 (33%) 4–4 (50%) — -3.12 1973 1698 118.0 — — — — +46 — — 52.0% -0.12 1–2 (33%) 3–0 (100%) — -0.13
29 1979 1618 131.4 — — — — -19 +166 — 38.3% -0.58 2–5 (29%) 3–6 (33%) — -1.00 1974 1863 142.6 — — — — -34 -6 -203 61.5% +0.43 5–5 (50%) 7–2 (78%) — -2.09
30 1980 1671 131.2 — — — — -19 — — 59.1% +0.91 1–3 (25%) 1–1 — -0.33 1975 1769 140.3 — — — — +80 +16 — 49.5% +0.08 9–8 (53%) 4–5 (44%) — -1.45
31 1981 1764 143.3 — — — — -10 -18 -91 48.9% -0.23 4–5 (44%) 10–10 (50%) — -1.40 1976 1816 127.2 — — — — +53 -51 — 60.7% +0.64 5–2 (71%) 3–3 (50%) — +3.43
32 1982 1742 140.8 — — — — -6 -6 -10 53.5% +0.11 4–8 (33%) 9–8 (53%) — -2.10 1977 1715 108.6 — — — — +35 — — 31.8% -1.27 1–3 (25%) 1–1 — +0.02
33 1983 1652 129.5 — — — — -39 +97 +56 43.8% -0.57 5–5 (50%) 9–4 (69%) — -1.80 — — — — — — — — — — — — — — — —
34 1984 1599 108.8 — — — — — — — 20.0% -1.60 0–2 0–1 — -0.33 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 — 1959 147.5 — — — — +19 -10 -85 49.6% -0.02 94–105 (47%) 93–94 (50%) 100.6 -6.02 — 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.