H2H data updated: 2026-09-02 00:00 UTC

Sergio Casal vs Ken Flach H2H: 1-0

Sergio Casal holds a 1–0 lead over Ken Flach in their ATP head-to-head. Across 1 main-draw meeting, Sergio Casal leads 1–0 on hard courts. Most recently, Sergio Casal won the 1986 Miami Open round of 128 6-4 6-4.

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Sergio Casal
ESP Age 63 Right-Handed 185 cm / 6'1"
H2H
1 – 0
1 main draw meetings
Ken Flach
USA Right-Handed 185 cm / 6'1"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Sergio Casal #39 6-4 6-4 Ken Flach #75 Match data Feb 11, 1986* R128 Miami Open 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
Sergio Casal #1,267 #31 122 1,794 112 138 44.8% 0 0 0 0 1 1
Ken Flach #815 #56 130 1,715 52 80 39.4% 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 Sergio Casal Ken Flach
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
18 1981 3–3 50.0% — 1,535 0 0 — — — — — — —
19 1982 3–9 25.0% — 1,497 0 0 1982 0–1 0.0% — 1,498 0 0
20 1983 11–11 50.0% #70 1,638 0 0 1983 2–3 40.0% #314 1,521 0 0
21 1984 2–9 18.2% #177 1,564 0 0 1984 7–6 53.8% #155 1,599 0 0
22 1985 18–10 64.3% #38 1,713 0 1 1985 12–12 50.0% #60 1,676 0 0
23 1986 23–28 45.1% #62 1,749 0 1 1986 4–15 21.1% #223 1,557 0 0
24 1987 20–25 44.4% #92 1,647 0 1 1987 10–13 43.5% #100 1,621 0 0
25 1988 21–20 51.2% #77 1,659 0 1 1988 7–12 36.8% #203 1,618 0 0
26 1989 8–12 40.0% #184 1,621 0 1 1989 6–7 46.2% #194 1,651 0 0
27 1990 3–7 30.0% #263 1,583 0 1 1990 3–6 33.3% #222 1,611 0 0
28 1991 0–1 0.0% #623 1,571 0 1 1991 0–2 0.0% #572 1,575 0 0
29 1992 0–2 0.0% #727 1,542 0 1 1992 0–1 0.0% #742 1,559 0 0
31 — — — — — — — 1994 1–1 50.0% #514 1,575 0 0
32 1995 0–1 0.0% #973 1,528 0 1 1995 0–1 0.0% #835 1,570 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 Sergio Casal Ken 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 %
18 1981 — — — — 3 3 6 50.0% — — — — — — — — — — — — — — — — — — — — — — — — —
19 1982 — — — — 3 8 11 27.3% 0 1 1 0.0% — — — — 1982 — — — — 0 1 1 0.0% — — — — — — — —
20 1983 — — — — 10 10 20 50.0% 1 1 2 50.0% — — — — 1983 1 1 2 50.0% 0 1 1 0.0% 1 1 2 50.0% — — — —
21 1984 — — — — 2 9 11 18.2% — — — — — — — — 1984 3 2 5 60.0% — — — — 3 3 6 50.0% 1 1 2 50.0%
22 1985 3 2 5 60.0% 15 7 22 68.2% — — — — 0 1 1 0.0% 1985 10 8 18 55.6% — — — — 1 2 3 33.3% 1 2 3 33.3%
23 1986 6 5 11 54.5% 10 15 25 40.0% 0 1 1 0.0% 7 7 14 50.0% 1986 2 6 8 25.0% 0 3 3 0.0% 2 2 4 50.0% 0 4 4 0.0%
24 1987 9 8 17 52.9% 9 13 22 40.9% 0 1 1 0.0% 2 3 5 40.0% 1987 6 8 14 42.9% — — — — 4 4 8 50.0% 0 1 1 0.0%
25 1988 4 5 9 44.4% 14 9 23 60.9% 0 1 1 0.0% 3 5 8 37.5% 1988 2 6 8 25.0% 0 1 1 0.0% 3 2 5 60.0% 2 3 5 40.0%
26 1989 0 1 1 0.0% 8 11 19 42.1% — — — — — — — — 1989 3 4 7 42.9% — — — — 2 1 3 66.7% 1 2 3 33.3%
27 1990 0 1 1 0.0% 1 5 6 16.7% — — — — 2 1 3 66.7% 1990 2 4 6 33.3% — — — — 1 1 2 50.0% 0 1 1 0.0%
28 1991 0 1 1 0.0% — — — — — — — — — — — — 1991 0 1 1 0.0% — — — — — — — — 0 1 1 0.0%
29 1992 0 1 1 0.0% 0 1 1 0.0% — — — — — — — — 1992 0 1 1 0.0% — — — — — — — — — — — —
31 — — — — — — — — — — — — — — — — — 1994 1 1 2 50.0% — — — — — — — — — — — —
32 1995 0 1 1 0.0% — — — — — — — — — — — — 1995 — — — — — — — — 0 1 1 0.0% — — — —
Career — 22 25 47 46.8% 75 91 166 45.2% 1 5 6 16.7% 14 17 31 45.2% — 30 42 72 41.7% 0 6 6 0.0% 17 17 34 50.0% 5 15 20 25.0%

Performance Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. 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 Sergio Casal Ken 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%
28 1991 1/1 4.0 1.0 70.9% 62.3% 28.0% 40.0% 45.5% 52.3% 41.8% 1991 2/2 7.5 1.5 65.6% 70.8% 56.1% 41.7% 16.7% 65.7% 33.4%
29 1992 2/2 3.0 2.0 62.5% 68.8% 46.9% 48.3% 15.4% 60.4% 32.9% 1992 1/1 6.0 3.0 50.8% 74.2% 40.0% 25.0% 0.0% 57.4% 32.4%
31 — —/— — — — — — — — — — 1994 2/2 9.5 3.0 59.7% 71.7% 42.9% 70.0% 50.0% 60.3% 28.8%
32 1995 1/1 2.0 2.0 52.8% 59.6% 47.6% 22.2% 35.7% 53.9% 43.9% 1995 1/1 10.0 14.0 48.1% 75.9% 41.5% 57.1% 41.2% 58.0% 41.3%

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 Sergio Casal Ken 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
18 1981 1536 115.2 — — — — — +32 — 46.7% -0.27 2–1 (67%) 1–1 — +0.29 — — — — — — — — — — — — — — — —
19 1982 1497 117.6 — — — — — +38 — 32.4% -0.94 3–3 (50%) 1–2 (33%) — +0.23 1982 1499 112.4 — — — — — — — 0.0% -4.00 — — — -0.28
20 1983 1638 140.0 — — — — — +13 — 44.1% -0.47 7–2 (78%) 3–3 (50%) — -1.00 1983 1522 107.7 — — — — — — — 41.7% -0.75 — 0–2 — +0.25
21 1984 1564 123.0 — — — — — +21 — 29.6% -1.26 0–4 (0%) 1–3 (25%) — -0.10 1984 1599 117.5 — — — — +21 — -14 51.2% -0.05 4–3 (57%) 2–4 (33%) — +0.63
22 1985 1713 135.2 — — — — -121 +5 — 56.7% +0.12 9–2 (82%) 6–3 (67%) — +0.39 1985 1676 134.2 — — — — +19 — -94 44.8% -0.26 4–0 (100%) 4–2 (67%) — -0.49
23 1986 1749 136.6 — — — — -18 -92 — 44.7% -0.22 8–6 (57%) 5–11 (31%) — +0.11 1986 1557 111.4 — — — — +7 -76 +56 29.4% -1.16 2–4 (33%) 2–4 (33%) — -0.12
24 1987 1647 135.2 — — — — +61 -24 — 44.9% -0.11 11–9 (55%) 2–14 (13%) — -1.44 1987 1622 115.8 — — — — -40 — +10 48.6% -0.39 2–5 (29%) 9–4 (69%) — +1.50
25 1988 1660 133.3 — — — — -27 +68 — 48.6% +0.08 11–3 (79%) 3–6 (33%) — -0.37 1988 1618 116.8 — — — — -94 — +56 42.1% -0.67 4–5 (44%) 4–5 (44%) — -1.49
26 1989 1621 124.9 — — — — — +62 — 38.3% -0.55 3–4 (43%) 1–4 (20%) — +0.44 1989 1652 118.7 — — — — -87 — +41 48.9% -0.31 3–4 (43%) 7–5 (58%) — -0.04
27 1990 1583 111.7 — — — — +37 +46 — 36.0% -0.76 2–3 (40%) 1–2 (33%) — +0.23 1990 1612 118.0 — — — — -53 — — 44.0% -0.40 1–4 (20%) 2–1 (67%) — -0.05
28 1991 1572 102.0 -0.71 +0.79 0.876 46.9% — — — 33.3% -1.00 0–1 — — -0.07 1991 1576 100.1 -1.14 -2.20 0.974 48.8% — — — 20.0% -1.20 0–1 1–1 — +0.27
29 1992 1542 97.6 -0.73 -1.59 0.832 47.0% — — — 20.0% -1.60 0–1 1–1 — +0.16 1992 1559 98.8 -2.84 -0.85 0.759 44.2% — — — 0.0% -3.00 — — — +0.08
31 — — — — — — — — — — — — — — — — 1994 1576 112.6 -0.30 +1.03 0.724 46.6% — — — 40.0% -1.00 1–0 1–0 — -0.06
32 1995 1528 99.2 +0.02 -2.49 0.953 48.5% — — — 33.3% -1.00 0–1 — — +0.02 1995 1571 105.1 +1.22 +5.29 0.983 49.9% — — — 40.0% 0.00 0–1 0–1 — -0.28
Career — 1794 138.7 -0.54 -1.22 0.876 47.4% -2 +8 — 44.2% -0.29 56–40 (58%) 25–50 (33%) 96.7 -0.44 — 1715 126.9 -0.75 +0.35 0.851 47.5% -29 -76 +12 43.2% -0.53 21–27 (44%) 32–29 (52%) 100.9 -0.06

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.