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

Daniel Vacek vs Doug Flach H2H: 0-1

Doug Flach holds a 1–0 lead over Daniel Vacek in their ATP head-to-head. Across 1 main-draw meeting, Doug Flach leads 1–0 on grass. Most recently, Doug Flach won the 1998 Queen's Club Championships round of 64 4-6 6-1 6-3.

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Daniel Vacek
CZE Age 55 Right-Handed 190 cm / 6'3"
H2H
0 – 1
1 main draw meetings
Doug Flach
USA Age 56 Right-Handed 183 cm / 6'0"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Doug Flach #222 4-6 6-1 6-3 Daniel Vacek #69 Match data Jun 10, 1998* R64 Queen's Club Championships ATP World Series → modern equivalent ATP 250 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
Daniel Vacek #1,133 #26 1,151 1,821 171 220 43.7% 0 0 0 0 0 0
Doug Flach #788 #108 415 1,628 28 46 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 Daniel Vacek Doug Flach
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 — — — — — — — 1988 1–1 50.0% #577 1,517 0 0
20 1991 1–3 25.0% #470 1,490 0 0 — — — — — — —
22 1993 13–22 37.1% #114 1,559 0 0 1993 6–8 42.9% #123 1,569 0 0
23 1994 25–27 48.1% #45 1,732 0 0 1994 4–17 19.0% #215 1,473 0 0
24 1995 30–31 49.2% #27 1,797 0 0 1995 0–1 0.0% #648 1,462 0 0
25 1996 23–29 44.2% #71 1,692 0 0 1996 3–2 60.0% #146 1,539 0 0
26 1997 19–26 42.2% #53 1,669 0 0 1997 11–14 44.0% #174 1,572 0 0
27 1998 25–29 46.3% #50 1,671 0 0 1998 3–3 50.0% #215 1,609 0 0
28 1999 29–31 48.3% #43 1,740 0 0 — — — — — — —
29 2000 4–13 23.5% #238 1,628 0 0 — — — — — — —
30 2001 2–7 22.2% #393 1,595 0 0 — — — — — — —
31 2002 0–2 0.0% #749 1,577 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 Daniel Vacek Doug Flach
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 %
17 — — — — — — — — — — — — — — — — — 1988 1 1 2 50.0% — — — — — — — — — — — —
20 1991 0 2 2 0.0% 1 1 2 50.0% — — — — — — — — — — — — — — — — — — — — — — — — —
22 1993 7 9 16 43.8% 4 6 10 40.0% 1 3 4 25.0% 1 4 5 20.0% 1993 6 6 12 50.0% — — — — — — — — 0 2 2 0.0%
23 1994 10 11 21 47.6% 3 6 9 33.3% 3 3 6 50.0% 9 7 16 56.3% 1994 3 8 11 27.3% 0 5 5 0.0% 0 3 3 0.0% 1 1 2 50.0%
24 1995 11 11 22 50.0% 4 7 11 36.4% 1 3 4 25.0% 14 10 24 58.3% 1995 — — — — — — — — 0 1 1 0.0% — — — —
25 1996 10 11 21 47.6% 4 5 9 44.4% 3 3 6 50.0% 6 10 16 37.5% 1996 1 1 2 50.0% — — — — 2 1 3 66.7% — — — —
26 1997 6 11 17 35.3% 2 5 7 28.6% 1 3 4 25.0% 10 7 17 58.8% 1997 5 8 13 38.5% 1 2 3 33.3% 3 3 6 50.0% 2 1 3 66.7%
27 1998 17 17 34 50.0% 3 2 5 60.0% 2 3 5 40.0% 3 7 10 30.0% 1998 0 1 1 0.0% 0 1 1 0.0% 3 1 4 75.0% — — — —
28 1999 20 17 37 54.1% 1 6 7 14.3% 6 3 9 66.7% 2 5 7 28.6% — — — — — — — — — — — — — — — — —
29 2000 4 9 13 30.8% 0 4 4 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
30 2001 2 5 7 28.6% — — — — 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — —
31 2002 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 87 105 192 45.3% 22 42 64 34.4% 17 23 40 42.5% 45 50 95 47.4% — 16 25 41 39.0% 1 8 9 11.1% 8 9 17 47.1% 3 4 7 42.9%

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 346/391 of Daniel Vacek's and 65/72 of Doug Flach'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 Daniel Vacek Doug Flach
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 4/4 3.8 2.8 61.6% 71.4% 42.5% 43.4% 19.0% 59.1% 34.1% — —/— — — — — — — — — —
22 1993 32/35 6.8 4.4 60.0% 72.6% 54.6% 58.6% 34.4% 65.5% 31.8% 1993 13/14 3.5 3.1 56.1% 68.3% 47.6% 46.4% 43.7% 59.0% 37.9%
23 1994 49/52 7.0 5.4 59.5% 74.6% 50.5% 56.6% 36.0% 65.1% 34.7% 1994 19/21 2.5 3.5 58.4% 63.4% 45.0% 59.5% 34.9% 55.7% 34.3%
24 1995 50/61 8.1 4.3 59.9% 75.7% 51.4% 61.3% 37.4% 65.9% 35.7% 1995 1/1 3.0 6.0 61.9% 65.0% 35.1% 62.5% 20.0% 53.6% 34.3%
25 1996 48/52 7.3 5.1 56.7% 76.2% 49.0% 53.1% 39.3% 64.6% 33.5% 1996 2/5 12.0 6.0 58.7% 67.1% 45.6% 43.2% 30.5% 58.4% 38.2%
26 1997 41/45 8.2 6.8 51.8% 76.0% 46.0% 59.0% 36.2% 61.5% 34.9% 1997 24/25 3.1 4.0 56.6% 65.8% 46.4% 52.8% 45.5% 57.4% 38.8%
27 1998 46/54 7.0 5.1 56.6% 74.9% 47.3% 61.9% 39.4% 62.8% 35.5% 1998 6/6 1.0 2.3 58.1% 60.6% 48.3% 41.0% 57.5% 55.2% 39.8%
28 1999 50/60 4.7 4.6 56.5% 70.1% 47.7% 64.0% 37.1% 60.1% 36.2% — —/— — — — — — — — — —
29 2000 15/17 4.2 5.4 53.6% 64.8% 40.6% 42.9% 30.9% 53.9% 30.4% — —/— — — — — — — — — —
30 2001 9/9 6.8 3.4 54.2% 67.3% 50.2% 50.6% 27.2% 59.5% 29.2% — —/— — — — — — — — — —
31 2002 2/2 5.0 2.5 58.4% 71.8% 37.5% 45.7% 36.5% 57.6% 36.6% — —/— — — — — — — — — —
Career — 346/391 6.8 5.0 57.1% 73.7% 48.8% 58.1% 36.5% 63.0% 34.4% — 65/74 3.1 3.6 57.3% 65.2% 46.2% 52.2% 42.3% 57.0% 37.3%

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 Daniel Vacek Doug Flach
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
20 1991 1490 102.2 -1.04 -0.09 0.834 46.2% — — — 22.2% -1.67 — 1–0 — +0.10 — — — — — — — — — — — — — — — —
22 1993 1560 126.4 +2.79 -4.51 0.922 49.1% -2 +9 -4 41.1% -0.61 3–7 (30%) 7–9 (44%) — +0.29 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
23 1994 1732 143.4 +3.08 -2.24 0.992 49.9% -14 -131 -90 47.5% -0.12 12–9 (57%) 13–15 (46%) — -1.41 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 1798 148.9 +3.89 -1.17 1.046 50.7% +14 -171 -195 48.7% +0.03 10–11 (48%) 15–18 (45%) — -1.99 1995 1462 99.6 -2.17 -0.92 0.740 43.9% — — — 33.3% -2.33 0–1 1–0 — +0.05
25 1996 1692 140.7 +2.32 -3.52 0.945 49.3% +10 -77 -50 45.5% -0.25 12–11 (52%) 14–11 (56%) — -2.02 1996 1540 108.3 +1.07 +1.46 0.919 48.0% — — +74 50.0% -0.83 — 4–0 (100%) — +0.18
26 1997 1670 134.8 -0.60 -1.91 0.906 48.1% +38 -50 -60 41.8% -0.61 6–7 (46%) 13–12 (52%) — -0.33 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 1672 143.3 +0.67 -1.11 0.956 49.4% +16 -20 -40 48.1% -0.21 6–8 (43%) 13–10 (57%) — +0.31 1998 1610 108.9 -2.52 +0.84 0.890 47.6% — — +73 42.9% -0.29 2–0 1–2 (33%) — -0.45
28 1999 1741 133.9 -1.09 -1.27 0.909 48.6% +1 -191 -65 46.2% -0.17 9–4 (69%) 7–11 (39%) — +0.89 — — — — — — — — — — — — — — — —
29 2000 1629 122.6 -4.37 -4.38 0.659 42.4% +53 -125 — 27.5% -2.08 1–2 (33%) 4–1 (80%) — -1.16 — — — — — — — — — — — — — — — —
30 2001 1595 122.1 -0.70 -2.81 0.721 45.3% +49 — — 23.8% -1.67 — 1–2 (33%) — -0.96 — — — — — — — — — — — — — — — —
31 2002 1578 111.7 +0.38 -0.21 0.865 46.5% — — — 16.7% -1.17 — 0–2 — -0.38 — — — — — — — — — — — — — — — —
Career — 1822 143.7 +1.22 -2.21 0.930 48.9% +12 -96 -70 44.3% -0.37 59–59 (50%) 88–91 (49%) 102.9 -1.71 — 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

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.