Doug Flach
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Andre Agassi | 2 | 2 | 4 | Jul 17, 1997 | H2H |
| MaliVai Washington | 0 | 3 | 3 | May 5, 1994 | H2H |
| Jerome Golmard | 1 | 1 | 2 | Jul 30, 1997 | H2H |
| Guillaume Raoux | 0 | 2 | 2 | Jun 27, 1997 | H2H |
| Slava Dosedel | 1 | 1 | 2 | Mar 18, 1997 | H2H |
H2H data updated: 2026-09-02 00:00 UTC
Doug Flach vs Lars Koslowski H2H: 1-0
Doug Flach holds a 1–0 lead over Lars Koslowski in their ATP head-to-head. Across 1 main-draw meeting, Doug Flach leads 1–0 on hard courts. Most recently, Doug Flach won the 1993 Japan Open round of 64 7-5 6-1.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
H2H
1
–
0
1 main draw meetings
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Doug Flach | 7-5 6-1 | Lars Koslowski | Match data | Apr 7, 1993* | R64 | Japan Open | ATP Championship Series → modern equivalent ATP 500 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doug Flach | #788 | #108 | 415 | 1,628 | 28 | 46 | 37.8% | 0 | 0 | 0 | 0 | 0 | 0 |
| 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 | Doug Flach | Lars Koslowski | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 17 | 1988 | 1–1 | 50.0% | #577 | 1,517 | 0 | 0 | — | — | — | — | — | — | — |
| 18 | — | — | — | — | — | — | — | 1989 | 1–1 | 50.0% | #520 | 1,512 | 0 | 0 |
| 20 | — | — | — | — | — | — | — | 1991 | 4–2 | 66.7% | #89 | 1,590 | 0 | 0 |
| 21 | — | — | — | — | — | — | — | 1992 | 10–20 | 33.3% | #116 | 1,520 | 0 | 0 |
| 22 | 1993 | 6–8 | 42.9% | #123 | 1,569 | 0 | 0 | 1993 | 2–5 | 28.6% | #252 | 1,511 | 0 | 0 |
| 23 | 1994 | 4–17 | 19.0% | #215 | 1,473 | 0 | 0 | — | — | — | — | — | — | — |
| 24 | 1995 | 0–1 | 0.0% | #648 | 1,462 | 0 | 0 | — | — | — | — | — | — | — |
| 25 | 1996 | 3–2 | 60.0% | #146 | 1,539 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 1997 | 11–14 | 44.0% | #174 | 1,572 | 0 | 0 | — | — | — | — | — | — | — |
| 27 | 1998 | 3–3 | 50.0% | #215 | 1,609 | 0 | 0 | — | — | — | — | — | — | — |
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 | Doug Flach | Lars Koslowski | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Carpet | Yr | Hard | Clay | Grass | Carpet | |||||||||||||||||||||||||
| 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 % | |||
| 17 | 1988 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1989 | — | — | — | — | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1991 | — | — | — | — | 4 | 1 | 5 | 80.0% | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 21 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1992 | 7 | 6 | 13 | 53.8% | 3 | 11 | 14 | 21.4% | 0 | 1 | 1 | 0.0% | 0 | 2 | 2 | 0.0% |
| 22 | 1993 | 6 | 6 | 12 | 50.0% | — | — | — | — | — | — | — | — | 0 | 2 | 2 | 0.0% | 1993 | 2 | 3 | 5 | 40.0% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 1994 | 3 | 8 | 11 | 27.3% | 0 | 5 | 5 | 0.0% | 0 | 3 | 3 | 0.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 1995 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 1996 | 1 | 1 | 2 | 50.0% | — | — | — | — | 2 | 1 | 3 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 1997 | 5 | 8 | 13 | 38.5% | 1 | 2 | 3 | 33.3% | 3 | 3 | 6 | 50.0% | 2 | 1 | 3 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 1998 | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | 3 | 1 | 4 | 75.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 16 | 25 | 41 | 39.0% | 1 | 8 | 9 | 11.1% | 8 | 9 | 17 | 47.1% | 3 | 4 | 7 | 42.9% | — | 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 65/72 of Doug Flach'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 | Doug Flach | 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 | — | —/— | — | — | — | — | — | — | — | — | — | 1992 | 25/30 | 1.4 | 2.7 | 65.8% | 58.5% | 43.8% | 54.2% | 36.4% | 53.4% | 38.5% |
| 22 | 1993 | 13/14 | 3.5 | 3.1 | 56.1% | 68.3% | 47.6% | 46.4% | 43.7% | 59.0% | 37.9% | 1993 | 7/7 | 3.1 | 4.1 | 55.6% | 57.1% | 46.2% | 33.9% | 37.2% | 51.9% | 34.4% |
| 23 | 1994 | 19/21 | 2.5 | 3.5 | 58.4% | 63.4% | 45.0% | 59.5% | 34.9% | 55.7% | 34.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 24 | 1995 | 1/1 | 3.0 | 6.0 | 61.9% | 65.0% | 35.1% | 62.5% | 20.0% | 53.6% | 34.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 25 | 1996 | 2/5 | 12.0 | 6.0 | 58.7% | 67.1% | 45.6% | 43.2% | 30.5% | 58.4% | 38.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 1997 | 24/25 | 3.1 | 4.0 | 56.6% | 65.8% | 46.4% | 52.8% | 45.5% | 57.4% | 38.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| 27 | 1998 | 6/6 | 1.0 | 2.3 | 58.1% | 60.6% | 48.3% | 41.0% | 57.5% | 55.2% | 39.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 65/74 | 3.1 | 3.6 | 57.3% | 65.2% | 46.2% | 52.2% | 42.3% | 57.0% | 37.3% | — | 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 | Doug Flach | 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 | |
| 17 | 1988 | 1517 | 110.2 | — | — | — | — | — | — | — | 40.0% | -0.20 | 1–0 | — | — | +0.02 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1989 | 1512 | 104.3 | — | — | — | — | — | — | — | 40.0% | +0.20 | 1–0 | — | — | -0.08 |
| 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 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 | 1993 | 1569 | 129.0 | -1.64 | +0.52 | 0.925 | 48.4% | +24 | — | — | 42.9% | -0.14 | 2–2 (50%) | 2–4 (33%) | — | +0.16 | 1993 | 1512 | 97.2 | -4.03 | -2.60 | 0.715 | 43.1% | +47 | — | — | 26.3% | -2.21 | 2–0 | 2–0 | — | +0.32 |
| 23 | 1994 | 1473 | 119.8 | -4.15 | -1.48 | 0.776 | 45.4% | +91 | +7 | +73 | 25.0% | -1.71 | 0–4 (0%) | 5–4 (56%) | — | -0.42 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 1995 | 1462 | 99.6 | -2.17 | -0.92 | 0.740 | 43.9% | — | — | — | 33.3% | -2.33 | 0–1 | 1–0 | — | +0.05 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 1996 | 1540 | 108.3 | +1.07 | +1.46 | 0.919 | 48.0% | — | — | +74 | 50.0% | -0.83 | — | 4–0 (100%) | — | +0.18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 1997 | 1573 | 119.7 | -3.04 | +0.18 | 0.912 | 48.2% | +20 | -88 | +66 | 46.9% | -0.72 | 3–6 (33%) | 7–3 (70%) | — | +1.00 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 1998 | 1610 | 108.9 | -2.52 | +0.84 | 0.890 | 47.6% | — | — | +73 | 42.9% | -0.29 | 2–0 | 1–2 (33%) | — | -0.45 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1629 | 125.3 | -2.90 | -0.15 | 0.868 | 47.3% | +43 | -29 | +71 | 40.1% | -0.86 | 8–13 (38%) | 20–13 (61%) | 102.9 | +0.73 | — | 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.
Lars Koslowski
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Mark Koevermans | 2 | 1 | 3 | May 22, 1992 | H2H |
| Luiz Mattar | 0 | 2 | 2 | Nov 12, 1992 | H2H |
| Javier Frana | 0 | 2 | 2 | Oct 31, 1992 | H2H |
| Guillermo Perez-Roldan | 1 | 1 | 2 | Oct 29, 1992 | H2H |
| Frederic Fontang | 0 | 2 | 2 | Aug 27, 1992 | H2H |