H2H data updated: 2026-10-19 00:00 UTC

Jeff Borowiak vs Ion Tiriac H2H: 1-1

Jeff Borowiak and Ion Tiriac are tied 1–1 in their ATP head-to-head. Across 2 main-draw meetings, Jeff Borowiak leads 1–0 on clay, while Ion Tiriac leads 1–0 on grass. Most recently, Jeff Borowiak won the 1977 Columbus round of 32 6-1 6-1.

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Jeff Borowiak
USA Age 77 Right-Handed 193 cm / 6'4"
H2H
1 – 1
2 main-draw meetings
Ion Tiriac
ROU Age 87 Right-Handed 185 cm / 6'1"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Jeff Borowiak #31 6-1 6-1 Ion Tiriac Match data Aug 11, 1977* R32 Columbus ATP 250 Clay
Ion Tiriac #87 6-4 7-6 7-5 Jeff Borowiak #115 Match data Sep 2, 1973* R64 US Open Grand Slam 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
Jeff Borowiak #920 #20 0 1,958 290 303 48.9% 0 0 0 0 5 5
Ion Tiriac #439 #55 0 1,885 226 188 54.6% 0 0 0 0 4 4

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 Ion Tiriac
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 6–6 50.0% — 1,574 0 0 — — — — — — —
21 1971 26–20 56.5% — 1,760 0 0 — — — — — — —
22 1972 20–28 41.7% — 1,825 0 0 — — — — — — —
23 1973 21–33 38.9% #82 1,732 0 0 — — — — — — —
24 1974 34–26 56.7% #40 1,858 0 2 — — — — — — —
25 1975 31–26 54.4% #48 1,807 0 2 — — — — — — —
26 1976 18–23 43.9% #60 1,724 0 2 — — — — — — —
27 1977 47–24 66.2% #25 1,825 0 5 — — — — — — —
28 1978 16–25 39.0% #98 1,671 0 5 — — — — — — —
29 1979 5–13 27.8% #125 1,617 0 5 1968 60–12 83.3% — 1,832 0 2
30 1980 5–5 50.0% #189 1,670 0 5 1969 14–14 50.0% — 1,762 0 2
31 1981 18–19 48.6% #52 1,763 0 5 1970 32–21 60.4% — 1,808 0 3
32 1982 21–20 51.2% #94 1,742 0 5 1971 27–16 62.8% — 1,782 0 4
33 1983 13–19 40.6% #98 1,652 0 5 1972 23–26 46.9% — 1,675 0 4
34 1984 0–4 0.0% #520 1,599 0 5 1973 34–35 49.3% #74 1,677 0 4
35 — — — — — — — 1974 9–14 39.1% #72 1,619 0 4
36 — — — — — — — 1975 8–10 44.4% #138 1,594 0 4
37 — — — — — — — 1976 1–7 12.5% #248 1,548 0 4
38 — — — — — — — 1977 15–20 42.9% #97 1,631 0 4
39 — — — — — — — 1978 2–10 16.7% #263 1,522 0 4
40 — — — — — — — 1979 1–3 25.0% #439 1,524 0 4

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 Ion Tiriac
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 2 4 50.0% 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% — — — — — — — — — — — — — — — — —
24 1974 9 9 18 50.0% 13 11 24 54.2% 2 3 5 40.0% 10 3 13 76.9% — — — — — — — — — — — — — — — — —
25 1975 11 9 20 55.0% 8 10 18 44.4% 3 2 5 60.0% 9 5 14 64.3% — — — — — — — — — — — — — — — — —
26 1976 3 3 6 50.0% 12 10 22 54.5% 0 2 2 0.0% 3 8 11 27.3% — — — — — — — — — — — — — — — — —
27 1977 7 8 15 46.7% 19 5 24 79.2% 0 2 2 0.0% 21 9 30 70.0% — — — — — — — — — — — — — — — — —
28 1978 1 5 6 16.7% 13 9 22 59.1% 0 3 3 0.0% 2 8 10 20.0% — — — — — — — — — — — — — — — — —
29 1979 0 3 3 0.0% 2 5 7 28.6% 1 1 2 50.0% 2 4 6 33.3% 1968 — — — — 56 11 67 83.6% 4 1 5 80.0% — — — —
30 1980 3 3 6 50.0% — — — — — — — — 2 2 4 50.0% 1969 4 5 9 44.4% 7 5 12 58.3% 2 2 4 50.0% 1 2 3 33.3%
31 1981 11 9 20 55.0% 2 3 5 40.0% 3 2 5 60.0% 2 5 7 28.6% 1970 6 5 11 54.5% 23 9 32 71.9% 2 2 4 50.0% 1 5 6 16.7%
32 1982 4 7 11 36.4% 4 3 7 57.1% 10 6 16 62.5% 3 4 7 42.9% 1971 4 4 8 50.0% 20 7 27 74.1% 3 2 5 60.0% 0 3 3 0.0%
33 1983 1 6 7 14.3% 7 5 12 58.3% 2 4 6 33.3% 3 4 7 42.9% 1972 6 9 15 40.0% 10 10 20 50.0% 4 3 7 57.1% 3 4 7 42.9%
34 1984 0 1 1 0.0% 0 2 2 0.0% 0 1 1 0.0% — — — — 1973 2 9 11 18.2% 21 19 40 52.5% 4 3 7 57.1% 7 4 11 63.6%
35 — — — — — — — — — — — — — — — — — 1974 2 3 5 40.0% 0 5 5 0.0% 0 1 1 0.0% 7 5 12 58.3%
36 — — — — — — — — — — — — — — — — — 1975 1 1 2 50.0% 1 2 3 33.3% 0 1 1 0.0% 6 6 12 50.0%
37 — — — — — — — — — — — — — — — — — 1976 1 2 3 33.3% 0 1 1 0.0% 0 1 1 0.0% 0 3 3 0.0%
38 — — — — — — — — — — — — — — — — — 1977 1 2 3 33.3% 13 14 27 48.1% 1 1 2 50.0% 0 3 3 0.0%
39 — — — — — — — — — — — — — — — — — 1978 1 2 3 33.3% 1 5 6 16.7% 0 3 3 0.0% — — — —
40 — — — — — — — — — — — — — — — — — 1979 — — — — — — — — 1 1 2 50.0% 0 2 2 0.0%
Career — 86 94 180 47.8% 99 90 189 52.4% 30 40 70 42.9% 75 79 154 48.7% — 28 42 70 40.0% 152 88 240 63.3% 21 21 42 50.0% 25 37 62 40.3%

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 Jeff Borowiak Ion Tiriac
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 1574 111.8 — — — — +80 -48 -75 50.0% -0.11 1–0 0–2 — -0.19 — — — — — — — — — — — — — — — —
21 1971 1761 131.5 — — — — +4 -150 -150 53.0% +0.15 10–5 (67%) 9–6 (60%) 110.0 -1.17 — — — — — — — — — — — — — — — —
22 1972 1826 149.5 — — — — +39 -235 — 43.2% -0.46 10–10 (50%) 9–10 (47%) 102.6 -7.30 — — — — — — — — — — — — — — — —
23 1973 1733 135.6 — — — — +28 -100 -173 43.0% -0.37 9–15 (38%) 7–10 (41%) 94.9 -4.55 — — — — — — — — — — — — — — — —
24 1974 1858 146.2 — — — — +26 -113 -272 56.0% +0.23 8–10 (44%) 12–6 (67%) 105.3 -4.92 — — — — — — — — — — — — — — — —
25 1975 1808 148.2 — — — — +64 -110 -178 53.6% +0.42 11–12 (48%) 5–9 (36%) 95.2 -5.88 — — — — — — — — — — — — — — — —
26 1976 1725 143.3 — — — — +66 -7 — 47.9% -0.08 9–9 (50%) 6–8 (43%) 97.4 -2.54 — — — — — — — — — — — — — — — —
27 1977 1825 151.8 — — — — -12 +74 — 61.0% +0.81 14–7 (67%) 9–9 (50%) 103.0 +0.48 — — — — — — — — — — — — — — — —
28 1978 1672 145.7 — — — — -11 +208 -147 43.0% -0.37 3–6 (33%) 4–4 (50%) 94.3 -3.12 — — — — — — — — — — — — — — — —
29 1979 1617 131.4 — — — — -18 +168 — 38.3% -0.58 2–5 (29%) 3–6 (33%) 96.1 -1.00 1968 1833 137.7 — — — — — +131 -203 75.3% +1.86 9–2 (82%) — — +2.00
30 1980 1671 131.2 — — — — -19 — — 59.1% +0.91 1–3 (25%) 1–1 — -0.33 1969 1763 123.3 — — — — -148 +136 -139 51.5% +0.17 1–0 — — -1.84
31 1981 1764 143.3 — — — — -10 -18 -91 48.9% -0.23 4–5 (44%) 10–10 (50%) 100.5 -1.40 1970 1808 137.8 — — — — -160 +97 -150 63.5% +0.93 3–9 (25%) — — -0.64
32 1982 1742 140.8 — — — — -6 -6 -10 53.5% +0.11 4–8 (33%) 9–8 (53%) 99.2 -2.10 1971 1783 135.6 — — — — -170 +111 -58 58.1% +0.67 5–1 (83%) 2–4 (33%) 103.9 +3.38
33 1983 1652 129.4 — — — — -39 +97 +56 43.8% -0.57 5–5 (50%) 9–4 (69%) 104.0 -1.80 1972 1676 128.9 — — — — -62 +102 +64 51.5% +0.05 6–15 (29%) 3–4 (43%) 92.8 +3.05
34 1984 1599 108.8 — — — — — — — 20.0% -1.60 0–2 0–1 — -0.33 1973 1678 129.0 — — — — -55 0 +87 50.6% +0.14 10–13 (43%) 7–6 (54%) 98.5 +4.22
35 — — — — — — — — — — — — — — — — 1974 1619 121.8 — — — — +72 -35 — 38.5% -0.69 3–2 (60%) 1–3 (25%) 100.2 +0.03
36 — — — — — — — — — — — — — — — — 1975 1595 116.1 — — — — +71 -22 — 43.5% -0.11 4–4 (50%) 1–8 (11%) 94.0 +2.98
37 — — — — — — — — — — — — — — — — 1976 1548 112.0 — — — — +53 — — 20.0% -2.20 0–1 0–1 — +0.52
38 — — — — — — — — — — — — — — — — 1977 1631 138.9 — — — — -92 +39 — 44.9% -0.49 2–6 (25%) 6–4 (60%) 98.6 -0.45
39 — — — — — — — — — — — — — — — — 1978 1523 117.6 — — — — +24 +98 +113 23.3% -1.60 1–2 (33%) 0–1 — +0.15
40 — — — — — — — — — — — — — — — — 1979 1525 117.9 — — — — — — — 40.0% -1.10 0–2 1–0 — -0.12
Career — 1959 147.6 — — — — +19 -8 -86 49.7% -0.01 94–105 (47%) 93–94 (50%) 100.6 -6.03 — 1886 136.9 — — — — -53 +83 -30 55.3% +0.42 44–57 (44%) 21–31 (40%) 92.8 +3.27

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.