H2H data updated: 2026-10-20 00:00 UTC

Ricardo Acuna vs Ken Flach H2H: 1-0

Ricardo Acuna holds a 1–0 lead over Ken Flach in their ATP head-to-head. Across 1 main-draw meeting, Ricardo Acuna leads 1–0 on hard courts. Most recently, Ricardo Acuna won the 1986 Livingston round of 32 6-4 6-4.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Ricardo Acuna
CHI Age 68 Right-Handed 175 cm / 5'9"
H2H
1 – 0
1 main-draw meetings
Ken Flach
USA Right-Handed 185 cm / 6'1"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Ricardo Acuna #144 6-4 6-4 Ken Flach #135 Match data Jul 24, 1986* R32 Livingston ATP 250 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
Ricardo Acuna #1,264 #47 19 1,729 60 101 37.3% 0 0 0 0 0 0
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 Ricardo Acuna Ken Flach
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
19 — — — — — — — 1982 0–1 0.0% — 1,498 0 0
20 1978 0–1 0.0% #232 1,494 0 0 1983 2–3 40.0% #314 1,521 0 0
21 1979 3–2 60.0% #312 1,532 0 0 1984 7–6 53.8% #155 1,599 0 0
22 1980 2–3 40.0% #151 1,530 0 0 1985 12–12 50.0% #60 1,676 0 0
23 1981 2–9 18.2% — 1,506 0 0 1986 4–15 21.1% #223 1,557 0 0
24 1982 7–10 41.2% #100 1,545 0 0 1987 10–13 43.5% #100 1,621 0 0
25 1983 15–17 46.9% #91 1,630 0 0 1988 7–12 36.8% #203 1,618 0 0
26 1984 6–11 35.3% #152 1,584 0 0 1989 6–7 46.2% #194 1,651 0 0
27 1985 9–10 47.4% #57 1,631 0 0 1990 3–6 33.3% #222 1,611 0 0
28 1986 9–20 31.0% #171 1,565 0 0 1991 0–2 0.0% #572 1,575 0 0
29 1987 3–8 27.3% #199 1,522 0 0 1992 0–1 0.0% #742 1,559 0 0
30 1988 4–7 36.4% #163 1,576 0 0 — — — — — — —
31 1989 0–3 0.0% #530 1,535 0 0 1994 1–1 50.0% #514 1,575 0 0
32 — — — — — — — 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 Ricardo Acuna 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 %
19 — — — — — — — — — — — — — — — — — 1982 — — — — 0 1 1 0.0% — — — — — — — —
20 1978 0 1 1 0.0% — — — — — — — — — — — — 1983 1 1 2 50.0% 0 1 1 0.0% 1 1 2 50.0% — — — —
21 1979 — — — — 3 2 5 60.0% — — — — — — — — 1984 3 2 5 60.0% — — — — 3 3 6 50.0% 1 1 2 50.0%
22 1980 — — — — 2 3 5 40.0% — — — — — — — — 1985 10 8 18 55.6% — — — — 1 2 3 33.3% 1 2 3 33.3%
23 1981 0 1 1 0.0% 2 7 9 22.2% — — — — 0 1 1 0.0% 1986 2 6 8 25.0% 0 3 3 0.0% 2 2 4 50.0% 0 4 4 0.0%
24 1982 1 3 4 25.0% 2 6 8 25.0% — — — — 4 1 5 80.0% 1987 6 8 14 42.9% — — — — 4 4 8 50.0% 0 1 1 0.0%
25 1983 7 7 14 50.0% 3 5 8 37.5% 5 4 9 55.6% 0 1 1 0.0% 1988 2 6 8 25.0% 0 1 1 0.0% 3 2 5 60.0% 2 3 5 40.0%
26 1984 0 2 2 0.0% 1 5 6 16.7% 5 4 9 55.6% — — — — 1989 3 4 7 42.9% — — — — 2 1 3 66.7% 1 2 3 33.3%
27 1985 3 6 9 33.3% 0 1 1 0.0% 6 3 9 66.7% — — — — 1990 2 4 6 33.3% — — — — 1 1 2 50.0% 0 1 1 0.0%
28 1986 3 6 9 33.3% 3 5 8 37.5% 2 4 6 33.3% 1 5 6 16.7% 1991 0 1 1 0.0% — — — — — — — — 0 1 1 0.0%
29 1987 3 6 9 33.3% 0 2 2 0.0% — — — — — — — — 1992 0 1 1 0.0% — — — — — — — — — — — —
30 1988 1 4 5 20.0% — — — — 2 2 4 50.0% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
31 1989 — — — — 0 1 1 0.0% 0 1 1 0.0% 0 1 1 0.0% 1994 1 1 2 50.0% — — — — — — — — — — — —
32 — — — — — — — — — — — — — — — — — 1995 — — — — — — — — 0 1 1 0.0% — — — —
Career — 18 36 54 33.3% 16 37 53 30.2% 20 18 38 52.6% 6 10 16 37.5% — 30 42 72 41.7% 0 6 6 0.0% 17 17 34 50.0% 5 15 20 25.0%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. 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 Ricardo Acuna 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
19 — — — — — — — — — — — — — — — — 1982 1499 112.4 — — — — — — — 0.0% -4.00 — — — -0.28
20 1978 1495 100.1 — — — — — — — 0.0% -4.50 — — — -0.07 1983 1522 107.7 — — — — — — — 41.7% -0.75 — 0–2 — +0.25
21 1979 1533 111.0 — — — — — +42 — 50.0% -0.22 3–1 (75%) 1–0 — +0.60 1984 1599 117.5 — — — — +21 — -15 51.2% -0.05 4–3 (57%) 2–4 (33%) 101.1 +0.63
22 1980 1530 105.7 — — — — — +35 — 41.7% -0.50 1–1 1–2 (33%) — +0.53 1985 1676 134.2 — — — — +19 — -94 44.8% -0.26 4–0 (100%) 4–2 (67%) 107.4 -0.49
23 1981 1506 124.7 — — — — — +39 — 25.0% -1.33 0–2 0–2 — -0.30 1986 1557 111.4 — — — — +7 -76 +56 29.4% -1.16 2–4 (33%) 2–4 (33%) 97.2 -0.12
24 1982 1546 116.6 — — — — +25 -26 — 39.5% -0.74 2–0 1–3 (25%) — +1.67 1987 1622 115.8 — — — — -40 — +10 48.6% -0.39 2–5 (29%) 9–4 (69%) 99.8 +1.50
25 1983 1631 124.5 — — — — -33 -102 +19 47.0% -0.28 4–5 (44%) 8–6 (57%) 103.4 +1.85 1988 1618 116.8 — — — — -94 — +56 42.1% -0.67 4–5 (44%) 4–5 (44%) 98.2 -1.49
26 1984 1585 112.8 — — — — — -78 +85 29.3% -1.22 2–0 1–5 (17%) — -0.40 1989 1652 118.7 — — — — -87 — +41 48.9% -0.31 3–4 (43%) 7–5 (58%) 102.6 -0.04
27 1985 1631 124.1 — — — — -84 — +162 45.1% -0.29 4–1 (80%) 3–6 (33%) 103.0 +0.26 1990 1612 118.0 — — — — -53 — — 44.0% -0.40 1–4 (20%) 2–1 (67%) — -0.05
28 1986 1565 124.0 — — — — -42 -61 +145 36.1% -0.99 2–5 (29%) 5–5 (50%) 96.1 -1.65 1991 1576 100.1 -1.14 -2.20 0.974 48.8% — — — 20.0% -1.20 0–1 1–1 — +0.27
29 1987 1522 116.9 — — — — -7 — — 33.3% -1.19 0–3 (0%) 1–0 — +0.32 1992 1559 98.8 -2.84 -0.85 0.759 44.2% — — — 0.0% -3.00 — — — +0.08
30 1988 1577 112.4 — — — — -79 — +139 40.0% -0.93 1–2 (33%) 5–1 (83%) 102.9 -0.40 — — — — — — — — — — — — — — — —
31 1989 1535 98.2 — — — — — — — 0.0% -2.83 — 0–1 — +0.14 1994 1576 112.6 -0.30 +1.03 0.724 46.6% — — — 40.0% -1.00 1–0 1–0 — -0.06
32 — — — — — — — — — — — — — — — — 1995 1571 105.1 +1.22 +5.29 0.983 49.9% — — — 40.0% 0.00 0–1 0–1 — -0.28
Career — 1730 126.5 — — — — -36 -25 +103 38.5% -0.79 19–20 (49%) 26–31 (46%) 101.0 +1.58 — 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.