H2H data updated: 2026-09-01 00:00 UTC

Ion Tiriac vs Clark Graebner H2H: 0-6

Clark Graebner holds a 6–0 lead over Ion Tiriac in their ATP head-to-head. Across 6 main-draw meetings, Clark Graebner leads 3–0 on clay and 2–0 on hard courts. Most recently, Clark Graebner won the 1975 Freeport round of 16 7-5 6-4.

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Ion Tiriac
ROU Age 87 Right-Handed 185 cm / 6'1"
H2H
0 – 6
6 main draw meetings
Clark Graebner
USA Age 82 Right-Handed 188 cm / 6'2"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Clark Graebner 7-5 6-4 Ion Tiriac Match data Jan 17, 1975* R16 Freeport ATP 250 Clay
Clark Graebner 6-4 6-4 Ion Tiriac Match data Mar 14, 1973* QF Paramus ATP 250 Hard
Clark Graebner 6-2 6-2 7-5 Ion Tiriac Match data Mar 12, 1971* SF Hampton ATP 250 Hard
Clark Graebner 1-6 6-3 6-1 Ion Tiriac Match data Jul 31, 1970* R16 Indianapolis ATP 250 Clay
Clark Graebner 1-6 6-3 6-1 Ion Tiriac Match data Jul 31, 1970* R16 Indianapolis ATP 250 Clay
Clark Graebner 4-6 14-12 6-2 (ret.) Ion Tiriac Match data Jun 26, 1970* R64 Wimbledon 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
Ion Tiriac #439 #55 0 1,888 230 190 54.8% 0 0 0 0 4 4
Clark Graebner #199 #45 0 2,014 342 161 68.0% 0 0 0 0 12 12

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 Ion Tiriac Clark Graebner
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
24 — — — — — — — 1968 74–22 77.1% — 1,818 0 2
25 — — — — — — — 1969 49–14 77.8% — 1,840 0 6
26 — — — — — — — 1970 58–28 67.4% — 1,840 0 8
27 — — — — — — — 1971 75–29 72.1% — 1,868 0 11
28 — — — — — — — 1972 33–22 60.0% — 1,811 0 11
29 1968 60–12 83.3% — 1,832 0 2 1973 34–19 64.2% #48 1,770 0 12
30 1969 14–14 50.0% — 1,763 0 2 1974 11–13 45.8% #99 1,693 0 12
31 1970 34–22 60.7% — 1,809 0 3 1975 8–11 42.1% #120 1,583 0 12
32 1971 27–16 62.8% — 1,783 0 4 1976 0–3 0.0% #199 1,540 0 12
33 1972 23–26 46.9% — 1,675 0 4 — — — — — — —
34 1973 36–36 50.0% #74 1,681 0 4 — — — — — — —
35 1974 9–14 39.1% #72 1,620 0 4 — — — — — — —
36 1975 8–10 44.4% #138 1,595 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 1,525 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 Ion Tiriac Clark Graebner
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 %
24 — — — — — — — — — — — — — — — — — 1968 30 11 41 73.2% 9 3 12 75.0% 28 6 34 82.4% 7 2 9 77.8%
25 — — — — — — — — — — — — — — — — — 1969 13 2 15 86.7% 10 4 14 71.4% 22 6 28 78.6% 4 2 6 66.7%
26 — — — — — — — — — — — — — — — — — 1970 15 11 26 57.7% 22 6 28 78.6% 12 3 15 80.0% 9 8 17 52.9%
27 — — — — — — — — — — — — — — — — — 1971 36 9 45 80.0% 19 7 26 73.1% 14 5 19 73.7% 6 8 14 42.9%
28 — — — — — — — — — — — — — — — — — 1972 17 10 27 63.0% 2 2 4 50.0% 9 4 13 69.2% 5 6 11 45.5%
29 1968 — — — — 56 11 67 83.6% 4 1 5 80.0% — — — — 1973 18 8 26 69.2% 5 4 9 55.6% 3 3 6 50.0% 8 4 12 66.7%
30 1969 4 5 9 44.4% 7 5 12 58.3% 2 2 4 50.0% 1 2 3 33.3% 1974 2 4 6 33.3% 4 4 8 50.0% 2 2 4 50.0% 3 3 6 50.0%
31 1970 6 5 11 54.5% 25 10 35 71.4% 2 2 4 50.0% 1 5 6 16.7% 1975 0 1 1 0.0% 3 4 7 42.9% — — — — 5 6 11 45.5%
32 1971 4 4 8 50.0% 20 7 27 74.1% 3 2 5 60.0% 0 3 3 0.0% 1976 0 1 1 0.0% — — — — — — — — 0 2 2 0.0%
33 1972 6 9 15 40.0% 10 10 20 50.0% 4 3 7 57.1% 3 4 7 42.9% — — — — — — — — — — — — — — — — —
34 1973 2 9 11 18.2% 23 20 43 53.5% 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 — 28 42 70 40.0% 156 90 246 63.4% 21 21 42 50.0% 25 37 62 40.3% — 131 57 188 69.7% 74 34 108 68.5% 90 29 119 75.6% 47 41 88 53.4%

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 Ion Tiriac Clark Graebner
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
24 — — — — — — — — — — — — — — — — 1968 1819 133.7 — — — — +90 -116 +78 73.3% +1.64 10–8 (56%) — — +0.49
25 — — — — — — — — — — — — — — — — 1969 1841 131.4 — — — — +153 -98 +107 71.5% +1.35 8–5 (62%) 1–0 — +5.30
26 — — — — — — — — — — — — — — — — 1970 1841 135.3 — — — — -21 +68 +150 62.4% +0.83 17–8 (68%) 4–2 (67%) — +2.59
27 — — — — — — — — — — — — — — — — 1971 1868 141.1 — — — — +44 +29 +136 65.4% +1.01 21–7 (75%) 17–15 (53%) — +5.35
28 — — — — — — — — — — — — — — — — 1972 1811 136.3 — — — — +27 +71 +133 58.0% +0.62 5–8 (38%) 6–4 (60%) — +3.04
29 1968 1833 137.7 — — — — — +131 -203 75.3% +1.86 9–2 (82%) — — +2.01 1973 1770 134.1 — — — — +58 +80 +109 62.2% +0.84 6–5 (55%) 9–9 (50%) — +3.67
30 1969 1763 123.3 — — — — -148 +136 -139 51.5% +0.17 1–0 — — -1.83 1974 1693 114.0 — — — — +41 +100 +143 46.2% -0.38 6–5 (55%) 3–4 (43%) — +1.75
31 1970 1810 138.9 — — — — -162 +93 -151 63.9% +0.98 3–10 (23%) — — -0.73 1975 1584 111.5 — — — — +73 +121 — 52.4% -0.05 0–5 (0%) 6–3 (67%) — +3.44
32 1971 1783 135.6 — — — — -170 +109 -57 58.1% +0.67 5–1 (83%) 2–4 (33%) — +3.37 1976 1541 91.6 — — — — +44 — — 0.0% -3.83 — — — +0.51
33 1972 1676 128.9 — — — — -62 +101 +65 51.5% +0.05 6–15 (29%) 3–4 (43%) — +3.07 — — — — — — — — — — — — — — — —
34 1973 1682 130.0 — — — — -58 -1 +83 51.4% +0.18 10–14 (42%) 7–6 (54%) — +4.22 — — — — — — — — — — — — — — — —
35 1974 1621 121.7 — — — — +70 -34 — 38.5% -0.69 3–2 (60%) 1–3 (25%) — +0.02 — — — — — — — — — — — — — — — —
36 1975 1596 116.1 — — — — +70 -20 — 43.5% -0.11 4–4 (50%) 1–8 (11%) — +2.98 — — — — — — — — — — — — — — — —
37 1976 1549 112.0 — — — — +52 — — 20.0% -2.20 0–1 0–1 — +0.52 — — — — — — — — — — — — — — — —
38 1977 1631 139.0 — — — — -93 +39 — 44.9% -0.49 2–6 (25%) 6–4 (60%) — -0.45 — — — — — — — — — — — — — — — —
39 1978 1523 117.6 — — — — +24 +99 +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 — 1888 137.2 — — — — -54 +82 -31 55.5% +0.44 44–59 (43%) 21–31 (40%) 92.2 +3.21 — 2015 136.6 — — — — +51 +24 +113 64.3% +0.96 73–51 (59%) 46–37 (55%) 100.5 +5.29

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.