Ken Flach
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Peter Lundgren | 0 | 3 | 3 | Jul 15, 1992 | H2H |
| John Sadri | 3 | 0 | 3 | Jun 26, 1987 | H2H |
| Tim Mayotte | 0 | 3 | 3 | Aug 7, 1985 | H2H |
| Vijay Amritraj | 3 | 0 | 3 | May 3, 1985 | H2H |
| Terry Moor | 1 | 2 | 3 | May 2, 1985 | H2H |
H2H data updated: 2026-10-22 00:00 UTC
Ken Flach vs Shigeyuki Nishio H2H: 1-0
Ken Flach holds a 1–0 lead over Shigeyuki Nishio in their ATP head-to-head. Across 1 main-draw meeting, Ken Flach leads 1–0 on hard courts. Most recently, Ken Flach won the 1983 Japan Open round of 64 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.
H2H
1
–
0
1 main-draw meetings
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Ken Flach | 6-4 6-4 | Shigeyuki Nishio | Match data | Oct 19, 1983* | R64 | Japan Open | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ken Flach | #815 | #56 | 130 | 1,715 | 52 | 80 | 39.4% | 0 | 0 | 0 | 0 | 0 | 0 |
| Shigeyuki Nishio | #1,024 | #263 | 9 | 1,533 | 4 | 11 | 26.7% | 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 | Ken Flach | Shigeyuki Nishio | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 19 | 1982 | 0–1 | 0.0% | — | 1,498 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 1983 | 2–3 | 40.0% | #314 | 1,521 | 0 | 0 | 1974 | 0–1 | 0.0% | #274 | 1,488 | 0 | 0 |
| 21 | 1984 | 7–6 | 53.8% | #155 | 1,599 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 1985 | 12–12 | 50.0% | #60 | 1,676 | 0 | 0 | — | — | — | — | — | — | — |
| 23 | 1986 | 4–15 | 21.1% | #223 | 1,557 | 0 | 0 | — | — | — | — | — | — | — |
| 24 | 1987 | 10–13 | 43.5% | #100 | 1,621 | 0 | 0 | 1978 | 0–1 | 0.0% | #263 | 1,482 | 0 | 0 |
| 25 | 1988 | 7–12 | 36.8% | #203 | 1,618 | 0 | 0 | 1979 | 2–2 | 50.0% | #439 | 1,504 | 0 | 0 |
| 26 | 1989 | 6–7 | 46.2% | #194 | 1,651 | 0 | 0 | 1980 | 1–1 | 50.0% | #372 | 1,518 | 0 | 0 |
| 27 | 1990 | 3–6 | 33.3% | #222 | 1,611 | 0 | 0 | 1981 | 1–1 | 50.0% | — | 1,520 | 0 | 0 |
| 28 | 1991 | 0–2 | 0.0% | #572 | 1,575 | 0 | 0 | 1982 | 0–2 | 0.0% | — | 1,501 | 0 | 0 |
| 29 | 1992 | 0–1 | 0.0% | #742 | 1,559 | 0 | 0 | 1983 | 0–1 | 0.0% | #423 | 1,484 | 0 | 0 |
| 30 | — | — | — | — | — | — | — | 1984 | 0–1 | 0.0% | #463 | 1,477 | 0 | 0 |
| 31 | 1994 | 1–1 | 50.0% | #514 | 1,575 | 0 | 0 | 1985 | 0–1 | 0.0% | #570 | 1,462 | 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 | Ken Flach | Shigeyuki Nishio | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 19 | 1982 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1983 | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | 1974 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 1984 | 3 | 2 | 5 | 60.0% | — | — | — | — | 3 | 3 | 6 | 50.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 1985 | 10 | 8 | 18 | 55.6% | — | — | — | — | 1 | 2 | 3 | 33.3% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 1986 | 2 | 6 | 8 | 25.0% | 0 | 3 | 3 | 0.0% | 2 | 2 | 4 | 50.0% | 0 | 4 | 4 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 1987 | 6 | 8 | 14 | 42.9% | — | — | — | — | 4 | 4 | 8 | 50.0% | 0 | 1 | 1 | 0.0% | 1978 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 25 | 1988 | 2 | 6 | 8 | 25.0% | 0 | 1 | 1 | 0.0% | 3 | 2 | 5 | 60.0% | 2 | 3 | 5 | 40.0% | 1979 | — | — | — | — | 2 | 1 | 3 | 66.7% | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 26 | 1989 | 3 | 4 | 7 | 42.9% | — | — | — | — | 2 | 1 | 3 | 66.7% | 1 | 2 | 3 | 33.3% | 1980 | — | — | — | — | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — |
| 27 | 1990 | 2 | 4 | 6 | 33.3% | — | — | — | — | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | 1981 | — | — | — | — | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — |
| 28 | 1991 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | 1982 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 29 | 1992 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | 1983 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1984 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | 1994 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | 1985 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 32 | 1995 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 30 | 42 | 72 | 41.7% | 0 | 6 | 6 | 0.0% | 17 | 17 | 34 | 50.0% | 5 | 15 | 20 | 25.0% | — | 0 | 4 | 4 | 0.0% | 4 | 5 | 9 | 44.4% | — | — | — | — | 0 | 2 | 2 | 0.0% |
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 | Ken Flach | Shigeyuki Nishio | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 1983 | 1522 | 107.7 | — | — | — | — | — | — | — | 41.7% | -0.75 | — | 0–2 | — | +0.25 | 1974 | 1488 | 92.4 | — | — | — | — | — | — | — | 0.0% | -5.50 | — | — | — | +0.06 |
| 21 | 1984 | 1599 | 117.5 | — | — | — | — | +21 | — | -15 | 51.2% | -0.05 | 4–3 (57%) | 2–4 (33%) | 101.1 | +0.63 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 1985 | 1676 | 134.2 | — | — | — | — | +19 | — | -94 | 44.8% | -0.26 | 4–0 (100%) | 4–2 (67%) | 107.4 | -0.49 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 1986 | 1557 | 111.4 | — | — | — | — | +7 | -76 | +56 | 29.4% | -1.16 | 2–4 (33%) | 2–4 (33%) | 97.2 | -0.12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 1987 | 1622 | 115.8 | — | — | — | — | -40 | — | +10 | 48.6% | -0.39 | 2–5 (29%) | 9–4 (69%) | 99.8 | +1.50 | 1978 | 1483 | 104.0 | — | — | — | — | — | — | — | 0.0% | -2.50 | — | — | — | -0.11 |
| 25 | 1988 | 1618 | 116.8 | — | — | — | — | -94 | — | +56 | 42.1% | -0.67 | 4–5 (44%) | 4–5 (44%) | 98.2 | -1.49 | 1979 | 1505 | 109.9 | — | — | — | — | — | +43 | — | 55.6% | +0.44 | 0–1 | — | — | +0.30 |
| 26 | 1989 | 1652 | 118.7 | — | — | — | — | -87 | — | +41 | 48.9% | -0.31 | 3–4 (43%) | 7–5 (58%) | 102.6 | -0.04 | 1980 | 1519 | 107.2 | — | — | — | — | — | — | — | 50.0% | -0.25 | — | — | — | -0.06 |
| 27 | 1990 | 1612 | 118.0 | — | — | — | — | -53 | — | — | 44.0% | -0.40 | 1–4 (20%) | 2–1 (67%) | — | -0.05 | 1981 | 1520 | 103.7 | — | — | — | — | — | — | — | 50.0% | +0.75 | — | — | — | +0.30 |
| 28 | 1991 | 1576 | 100.1 | -1.14 | -2.20 | 0.974 | 48.8% | — | — | — | 20.0% | -1.20 | 0–1 | 1–1 | — | +0.27 | 1982 | 1501 | 103.2 | — | — | — | — | — | — | — | 0.0% | -4.00 | — | — | — | +0.02 |
| 29 | 1992 | 1559 | 98.8 | -2.84 | -0.85 | 0.759 | 44.2% | — | — | — | 0.0% | -3.00 | — | — | — | +0.08 | 1983 | 1485 | 98.3 | — | — | — | — | — | — | — | 0.0% | -2.00 | — | — | — | +0.18 |
| 30 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1984 | 1478 | 99.7 | — | — | — | — | — | — | — | 0.0% | -4.00 | — | — | — | -0.09 |
| 31 | 1994 | 1576 | 112.6 | -0.30 | +1.03 | 0.724 | 46.6% | — | — | — | 40.0% | -1.00 | 1–0 | 1–0 | — | -0.06 | 1985 | 1463 | 98.3 | — | — | — | — | — | — | — | 0.0% | -2.00 | — | — | — | +0.17 |
| 32 | 1995 | 1571 | 105.1 | +1.22 | +5.29 | 0.983 | 49.9% | — | — | — | 40.0% | 0.00 | 0–1 | 0–1 | — | -0.28 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 | — | 1534 | 106.6 | — | — | — | — | — | +43 | — | 29.0% | -1.36 | 0–1 | — | — | +5.13 |
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.
Shigeyuki Nishio
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Toru Yonezawa | 2 | 0 | 2 | Oct 21, 1981 | H2H |
| Hajime Nihonmatsu | 0 | 1 | 1 | Oct 16, 1985 | H2H |
| David Pate | 0 | 1 | 1 | Oct 10, 1984 | H2H |
| Ken Flach | 0 | 1 | 1 | Oct 19, 1983 | H2H |
| Vitas Gerulaitis | 0 | 1 | 1 | Oct 28, 1982 | H2H |