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

Ken Flach vs John Alexander H2H: 1-0

Ken Flach holds a 1–0 lead over John Alexander in their ATP head-to-head. Across 1 main-draw meeting, Ken Flach leads 1–0 on grass. Most recently, Ken Flach won the 1984 Sydney International round of 64 3-6 7-5 6-4.

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Ken Flach
USA Right-Handed 185 cm / 6'1"
H2H
1 – 0
1 main draw meetings
John Alexander
AUS Age 75 Right-Handed 190 cm / 6'3"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Ken Flach #189 3-6 7-5 6-4 John Alexander #138 Match data Dec 12, 1984* R64 Sydney International 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
Ken Flach #815 #56 130 1,715 52 80 39.4% 0 0 0 0 0 0
John Alexander #860 #8 0 2,015 567 419 57.5% 0 0 0 0 7 7

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 Ken Flach John Alexander
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 — — — — — — — 1968 27–14 65.9% — 1,630 0 0
17 — — — — — — — 1969 29–21 58.0% — 1,636 0 0
18 — — — — — — — 1970 24–14 63.2% — 1,819 0 1
19 1982 0–1 0.0% — 1,498 0 0 1971 44–36 55.0% — 1,816 0 1
20 1983 2–3 40.0% #314 1,521 0 0 1972 36–32 52.9% — 1,856 0 1
21 1984 7–6 53.8% #155 1,599 0 0 1973 46–30 60.5% #29 1,917 0 1
22 1985 12–12 50.0% #60 1,676 0 0 1974 38–23 62.3% #26 1,849 0 1
23 1986 4–15 21.1% #223 1,557 0 0 1975 61–24 71.8% #8 1,946 0 2
24 1987 10–13 43.5% #100 1,621 0 0 1976 19–21 47.5% #47 1,841 0 2
25 1988 7–12 36.8% #203 1,618 0 0 1977 48–33 59.3% #21 1,878 0 3
26 1989 6–7 46.2% #194 1,651 0 0 1978 50–31 61.7% #22 1,810 0 3
27 1990 3–6 33.3% #222 1,611 0 0 1979 38–28 57.6% #20 1,798 0 4
28 1991 0–2 0.0% #572 1,575 0 0 1980 10–18 35.7% #100 1,686 0 4
29 1992 0–1 0.0% #742 1,559 0 0 1981 23–21 52.3% #75 1,744 0 4
30 — — — — — — — 1982 38–21 64.4% #31 1,792 0 6
31 1994 1–1 50.0% #514 1,575 0 0 1983 24–25 49.0% #77 1,658 0 7
32 1995 0–1 0.0% #835 1,570 0 0 1984 12–21 36.4% #142 1,565 0 7
33 — — — — — — — 1985 0–6 0.0% #405 1,492 0 7

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 Ken Flach John Alexander
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 %
16 — — — — — — — — — — — — — — — — — 1968 0 1 1 0.0% 22 10 32 68.8% 5 3 8 62.5% — — — —
17 — — — — — — — — — — — — — — — — — 1969 0 1 1 0.0% 7 7 14 50.0% 21 12 33 63.6% 1 1 2 50.0%
18 — — — — — — — — — — — — — — — — — 1970 4 1 5 80.0% 10 6 16 62.5% 6 6 12 50.0% 4 1 5 80.0%
19 1982 — — — — 0 1 1 0.0% — — — — — — — — 1971 21 12 33 63.6% 12 9 21 57.1% 4 5 9 44.4% 7 10 17 41.2%
20 1983 1 1 2 50.0% 0 1 1 0.0% 1 1 2 50.0% — — — — 1972 11 10 21 52.4% 9 5 14 64.3% 6 3 9 66.7% 10 14 24 41.7%
21 1984 3 2 5 60.0% — — — — 3 3 6 50.0% 1 1 2 50.0% 1973 8 6 14 57.1% 14 11 25 56.0% 3 3 6 50.0% 21 10 31 67.7%
22 1985 10 8 18 55.6% — — — — 1 2 3 33.3% 1 2 3 33.3% 1974 12 5 17 70.6% 13 6 19 68.4% 9 5 14 64.3% 4 7 11 36.4%
23 1986 2 6 8 25.0% 0 3 3 0.0% 2 2 4 50.0% 0 4 4 0.0% 1975 13 3 16 81.3% 20 8 28 71.4% 6 3 9 66.7% 22 10 32 68.8%
24 1987 6 8 14 42.9% — — — — 4 4 8 50.0% 0 1 1 0.0% 1976 3 5 8 37.5% 9 7 16 56.3% 2 2 4 50.0% 5 7 12 41.7%
25 1988 2 6 8 25.0% 0 1 1 0.0% 3 2 5 60.0% 2 3 5 40.0% 1977 4 5 9 44.4% 19 6 25 76.0% 18 8 26 69.2% 7 14 21 33.3%
26 1989 3 4 7 42.9% — — — — 2 1 3 66.7% 1 2 3 33.3% 1978 2 5 7 28.6% 24 10 34 70.6% 18 6 24 75.0% 6 10 16 37.5%
27 1990 2 4 6 33.3% — — — — 1 1 2 50.0% 0 1 1 0.0% 1979 12 5 17 70.6% 13 8 21 61.9% 6 6 12 50.0% 7 9 16 43.8%
28 1991 0 1 1 0.0% — — — — — — — — 0 1 1 0.0% 1980 4 5 9 44.4% 3 2 5 60.0% 1 3 4 25.0% 2 8 10 20.0%
29 1992 0 1 1 0.0% — — — — — — — — — — — — 1981 7 9 16 43.8% 8 6 14 57.1% 7 5 12 58.3% 1 1 2 50.0%
30 — — — — — — — — — — — — — — — — — 1982 6 5 11 54.5% 10 7 17 58.8% 16 5 21 76.2% 6 4 10 60.0%
31 1994 1 1 2 50.0% — — — — — — — — — — — — 1983 7 5 12 58.3% 11 9 20 55.0% 2 6 8 25.0% 4 5 9 44.4%
32 1995 — — — — — — — — 0 1 1 0.0% — — — — 1984 4 6 10 40.0% 4 5 9 44.4% 3 7 10 30.0% 1 3 4 25.0%
33 — — — — — — — — — — — — — — — — — 1985 0 3 3 0.0% 0 1 1 0.0% 0 2 2 0.0% — — — —
Career — 30 42 72 41.7% 0 6 6 0.0% 17 17 34 50.0% 5 15 20 25.0% — 118 92 210 56.2% 208 123 331 62.8% 133 90 223 59.6% 108 114 222 48.6%

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 Ken Flach John Alexander
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
16 — — — — — — — — — — — — — — — — 1968 1630 115.5 — — — — — +31 -45 58.8% +0.55 5–3 (63%) — — -0.25
17 — — — — — — — — — — — — — — — — 1969 1636 120.9 — — — — -112 +1 +83 58.9% +0.61 5–8 (38%) — — +3.75
18 — — — — — — — — — — — — — — — — 1970 1820 138.4 — — — — -87 -42 -115 59.1% +0.62 6–6 (50%) 2–1 (67%) — +1.24
19 1982 1499 112.4 — — — — — — — 0.0% -4.00 — — — -0.28 1971 1817 144.4 — — — — -5 +9 -82 55.2% +0.33 7–16 (30%) 18–12 (60%) — -3.21
20 1983 1522 107.7 — — — — — — — 41.7% -0.75 — 0–2 — +0.25 1972 1856 153.5 — — — — -29 +48 -73 53.7% +0.51 13–16 (45%) 13–24 (35%) — -8.33
21 1984 1599 117.5 — — — — +21 — -14 51.2% -0.05 4–3 (57%) 2–4 (33%) — +0.63 1973 1917 150.8 — — — — +39 -78 -95 57.3% +0.44 13–12 (52%) 19–14 (58%) — -3.88
22 1985 1676 134.2 — — — — +19 — -94 44.8% -0.26 4–0 (100%) 4–2 (67%) — -0.49 1974 1850 146.4 — — — — +27 +47 +21 60.4% +0.86 9–8 (53%) 12–14 (46%) — +0.21
23 1986 1557 111.4 — — — — +7 -76 +56 29.4% -1.16 2–4 (33%) 2–4 (33%) — -0.12 1975 1946 155.4 — — — — +66 +20 -94 66.4% +1.04 15–9 (63%) 23–11 (68%) — -0.90
24 1987 1622 115.8 — — — — -40 — +10 48.6% -0.39 2–5 (29%) 9–4 (69%) — +1.50 1976 1841 150.1 — — — — +55 +53 -1 48.4% -0.02 5–7 (42%) 8–12 (40%) — -2.95
25 1988 1618 116.8 — — — — -94 — +56 42.1% -0.67 4–5 (44%) 4–5 (44%) — -1.49 1977 1878 156.4 — — — — -38 +45 +16 58.5% +0.69 13–18 (42%) 16–15 (52%) — -1.53
26 1989 1652 118.7 — — — — -87 — +41 48.9% -0.31 3–4 (43%) 7–5 (58%) — -0.04 1978 1810 149.4 — — — — -79 +125 +104 58.6% +0.69 15–14 (52%) 10–14 (42%) — +2.66
27 1990 1612 118.0 — — — — -53 — — 44.0% -0.40 1–4 (20%) 2–1 (67%) — -0.05 1979 1799 156.8 — — — — +64 +143 -3 53.0% +0.25 15–10 (60%) 15–13 (54%) — -3.64
28 1991 1576 100.1 -1.14 -2.20 0.974 48.8% — — — 20.0% -1.20 0–1 1–1 — +0.27 1980 1687 138.0 — — — — +72 +209 +52 38.8% -0.58 4–5 (44%) 7–8 (47%) — -0.32
29 1992 1559 98.8 -2.84 -0.85 0.759 44.2% — — — 0.0% -3.00 — — — +0.08 1981 1744 136.6 — — — — -49 +128 0 52.7% +0.29 7–8 (47%) 9–11 (45%) — +0.63
30 — — — — — — — — — — — — — — — — 1982 1792 141.1 — — — — -49 +33 +52 57.6% +0.56 17–7 (71%) 13–14 (48%) — +0.78
31 1994 1576 112.6 -0.30 +1.03 0.724 46.6% — — — 40.0% -1.00 1–0 1–0 — -0.06 1983 1658 134.7 — — — — +55 +150 +81 47.5% +0.09 7–5 (58%) 10–14 (42%) — +1.71
32 1995 1571 105.1 +1.22 +5.29 0.983 49.9% — — — 40.0% 0.00 0–1 0–1 — -0.28 1984 1565 130.2 — — — — +79 +244 +37 39.0% -0.49 5–6 (45%) 6–10 (38%) — -0.48
33 — — — — — — — — — — — — — — — — 1985 1493 102.7 — — — — +110 — — 13.3% -2.13 0–1 1–2 (33%) — -0.02
Career — 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 — 2016 150.6 — — — — +12 +56 +17 55.6% +0.46 161–159 (50%) 182–189 (49%) 95.7 -1.49

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.