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

Jaime Oncins vs Lars Koslowski H2H: 1-0

Jaime Oncins holds a 1–0 lead over Lars Koslowski in their ATP head-to-head. Across 1 main-draw meeting, Jaime Oncins leads 1–0 on clay. Most recently, Jaime Oncins won the 1992 Bologna quarterfinal 7-6(1) 7-5.

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Jaime Oncins
BRA Age 56 Right-Handed 196 cm / 6'5"
H2H
1 – 0
1 main draw meetings
Lars Koslowski
GER Age 55 Right-Handed 188 cm / 6'2"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Jaime Oncins #87 7-6(1) 7-5 Lars Koslowski #75 Match data May 23, 1992* QF Bologna ATP World Series → modern equivalent 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
Jaime Oncins #1,034 #34 773 1,810 64 87 42.4% 0 0 0 0 2 2
Lars Koslowski #1,378 #63 576 1,658 17 28 37.8% 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 Jaime Oncins Lars Koslowski
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
18 1988 1–2 33.3% #314 1,493 0 0 1989 1–1 50.0% #520 1,512 0 0
19 1989 0–2 0.0% #263 1,470 0 0 — — — — — — —
20 1990 0–4 0.0% #113 1,442 0 0 1991 4–2 66.7% #89 1,590 0 0
21 1991 22–17 56.4% #64 1,677 0 0 1992 10–20 33.3% #116 1,520 0 0
22 1992 27–19 58.7% #48 1,778 0 2 1993 2–5 28.6% #252 1,511 0 0
23 1993 11–23 32.4% #133 1,584 0 2 — — — — — — —
24 1994 1–7 12.5% #230 1,505 0 2 — — — — — — —
25 1995 1–2 33.3% #222 1,508 0 2 — — — — — — —
26 1996 0–2 0.0% #160 1,491 0 2 — — — — — — —
27 1997 0–6 0.0% #166 1,439 0 2 — — — — — — —
28 1998 1–2 33.3% #223 1,451 0 2 — — — — — — —
31 2001 0–1 0.0% #1031 1,438 0 2 — — — — — — —

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 Jaime Oncins Lars Koslowski
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 1988 1 2 3 33.3% — — — — — — — — — — — — 1989 — — — — 1 1 2 50.0% — — — — — — — —
19 1989 0 1 1 0.0% — — — — — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
20 1990 0 2 2 0.0% — — — — — — — — 0 2 2 0.0% 1991 — — — — 4 1 5 80.0% — — — — 0 1 1 0.0%
21 1991 13 10 23 56.5% 7 5 12 58.3% 2 2 4 50.0% — — — — 1992 7 6 13 53.8% 3 11 14 21.4% 0 1 1 0.0% 0 2 2 0.0%
22 1992 12 11 23 52.2% 15 8 23 65.2% — — — — — — — — 1993 2 3 5 40.0% 0 2 2 0.0% — — — — — — — —
23 1993 4 7 11 36.4% 7 15 22 31.8% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
24 1994 1 2 3 33.3% 0 5 5 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
25 1995 — — — — 1 2 3 33.3% — — — — — — — — — — — — — — — — — — — — — — — — —
26 1996 0 1 1 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
27 1997 0 3 3 0.0% 0 3 3 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
28 1998 1 2 3 33.3% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
31 2001 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 32 42 74 43.2% 30 39 69 43.5% 2 2 4 50.0% 0 4 4 0.0% — 9 9 18 50.0% 8 15 23 34.8% 0 1 1 0.0% 0 3 3 0.0%

Performance Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 125/142 of Jaime Oncins's and 37/43 of Lars Koslowski's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.

Age Jaime Oncins Lars Koslowski
Yr Sample Aces/M DFs/M 1st Sv% 1st Pts% 2nd Pts% BP Saved% BP Conv% Svc Pts% Ret Pts% Yr Sample Aces/M DFs/M 1st Sv% 1st Pts% 2nd Pts% BP Saved% BP Conv% Svc Pts% Ret Pts%
20 — —/— — — — — — — — — — 1991 5/6 2.2 1.2 72.9% 64.7% 48.5% 59.0% 35.8% 60.4% 40.8%
21 1991 35/39 3.2 2.6 55.4% 69.9% 50.1% 49.9% 43.4% 61.0% 41.7% 1992 25/30 1.4 2.7 65.8% 58.5% 43.8% 54.2% 36.4% 53.4% 38.5%
22 1992 42/46 3.0 3.8 55.5% 69.7% 45.7% 54.9% 43.5% 59.3% 42.8% 1993 7/7 3.1 4.1 55.6% 57.1% 46.2% 33.9% 37.2% 51.9% 34.4%
23 1993 29/34 2.9 4.4 58.2% 66.6% 40.7% 51.5% 42.1% 55.8% 40.6% — —/— — — — — — — — — —
24 1994 6/8 2.2 9.0 57.5% 65.4% 40.9% 63.4% 41.9% 55.0% 39.7% — —/— — — — — — — — — —
25 1995 3/3 3.0 5.3 60.8% 70.0% 43.9% 63.0% 24.5% 59.4% 39.6% — —/— — — — — — — — — —
26 1996 2/2 1.5 18.5 45.0% 69.3% 28.9% 47.3% 28.6% 47.0% 43.5% — —/— — — — — — — — — —
27 1997 6/6 3.0 9.7 51.8% 67.9% 35.1% 48.8% 61.9% 52.0% 35.0% — —/— — — — — — — — — —
28 1998 1/3 4.0 8.0 57.7% 66.7% 31.8% 33.3% 33.3% 51.9% 35.1% — —/— — — — — — — — — —
31 2001 1/1 3.0 13.0 56.5% 63.9% 46.8% 60.0% 50.0% 56.5% 39.3% — —/— — — — — — — — — —
Career — 125/151 3.0 4.5 56.0% 68.7% 44.6% 52.8% 43.3% 58.1% 41.3% — 37/45 1.9 2.8 64.8% 59.0% 44.9% 51.0% 36.5% 54.1% 38.1%

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 Jaime Oncins Lars Koslowski
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 1988 1493 95.3 — — — — +23 — — 42.9% -1.86 0–1 3–0 (100%) — +0.30 1989 1512 104.3 — — — — — — — 40.0% +0.20 1–0 — — -0.08
19 1989 1471 95.4 — — — — — — — 0.0% -3.50 — — — +0.19 — — — — — — — — — — — — — — — —
20 1990 1442 102.8 — — — — +19 — — 20.0% -2.00 0–2 — — -0.15 1991 1590 126.9 +0.99 +1.88 1.031 50.4% — +70 — 66.7% +0.13 1–2 (33%) 4–0 (100%) — -0.17
21 1991 1677 121.5 +0.13 +1.64 1.068 51.1% -83 -50 -66 55.6% +0.24 5–9 (36%) 5–4 (56%) — +1.89 1992 1521 111.0 -5.44 -1.07 0.828 46.1% +38 +28 — 33.3% -1.25 2–3 (40%) 4–5 (44%) — +1.25
22 1992 1778 131.6 -1.02 +2.52 1.052 50.9% -123 +21 — 58.1% +0.28 7–7 (50%) 11–3 (79%) — +1.08 1993 1512 97.2 -4.03 -2.60 0.715 43.1% +47 — — 26.3% -2.21 2–0 2–0 — +0.32
23 1993 1584 130.7 -3.35 +1.16 0.920 48.2% +18 +63 — 39.3% -0.56 5–11 (31%) 2–9 (18%) — -0.21 — — — — — — — — — — — — — — — —
24 1994 1506 104.0 -2.79 -0.18 0.883 47.5% +74 +44 — 36.4% -0.86 0–6 (0%) 0–2 — +0.29 — — — — — — — — — — — — — — — —
25 1995 1509 108.4 +0.94 -0.26 0.977 49.5% — +44 — 33.3% -0.50 — — — -0.02 — — — — — — — — — — — — — — — —
26 1996 1491 108.9 +1.07 +2.59 0.821 45.2% — — — 28.6% -2.14 0–1 1–1 — -0.08 — — — — — — — — — — — — — — — —
27 1997 1439 112.1 -3.40 -1.77 0.729 43.8% +88 +85 — 13.3% -1.93 0–1 0–2 — -0.45 — — — — — — — — — — — — — — — —
28 1998 1451 107.4 -1.60 -1.30 0.730 43.1% +85 — — 33.3% -1.17 — 1–1 — -0.07 — — — — — — — — — — — — — — — —
31 2001 1438 100.2 +0.01 -0.73 0.903 49.0% — — — 33.3% -0.33 0–1 0–1 — +0.18 — — — — — — — — — — — — — — — —
Career — 1810 127.5 -1.35 +1.50 0.987 49.6% -49 +28 -66 47.0% -0.28 17–39 (30%) 23–23 (50%) 90.4 +1.95 — 1659 113.6 -4.30 -0.96 0.829 46.1% +40 +39 — 37.0% -1.16 6–5 (55%) 10–5 (67%) 108.1 +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.