Naoko Sato
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Betsy Nagelsen | 0 | 4 | 4 | Nov 14, 1984 | H2H |
| Pam Whytcross | 1 | 2 | 3 | Jul 12, 1980 | H2H |
| Belinda Thompson | 3 | 0 | 3 | Jun 7, 1978 | H2H |
| Julie Anthony | 0 | 3 | 3 | Jun 22, 1977 | H2H |
| Linky Boshoff | 0 | 3 | 3 | Aug 11, 1976 | H2H |
H2H data updated: 2026-09-12 00:00 UTC
Naoko Sato vs Monica Simmen H2H: 1-0
Naoko Sato holds a 1–0 lead over Monica Simmen in their WTA head-to-head. Across 1 main-draw meeting, Naoko Sato leads 1–0 on grass. Most recently, Naoko Sato won the 1978 Christchurch round of 64 6-4 6-0.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Naoko Sato | 6-4 6-0 | Monica Simmen | Match data | Nov 22, 1978* | R64 | Christchurch | WTA 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Naoko Sato | — | — | — | 1,628 | 56 | 91 | 38.1% | 0 | 0 | 0 | 0 | 0 | 0 |
| Monica Simmen | — | — | — | 1,547 | 11 | 18 | 37.9% | 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.
| Naoko Sato | Monica Simmen | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1972 | 2–3 | 40.0% | — | 1,504 | 0 | 0 | 1976 | 0–1 | 0.0% | — | 1,494 | 0 | 0 |
| 1973 | 4–6 | 40.0% | — | 1,495 | 0 | 0 | 1977 | 3–2 | 60.0% | — | 1,533 | 0 | 0 |
| 1974 | 7–16 | 30.4% | — | 1,452 | 0 | 0 | 1978 | 1–5 | 16.7% | — | 1,482 | 0 | 0 |
| 1975 | 5–7 | 41.7% | — | 1,492 | 0 | 0 | 1979 | 1–1 | 50.0% | — | 1,483 | 0 | 0 |
| 1976 | 4–8 | 33.3% | — | 1,530 | 0 | 0 | 1980 | 2–3 | 40.0% | — | 1,487 | 0 | 0 |
| 1977 | 8–12 | 40.0% | — | 1,566 | 0 | 0 | 1981 | 4–6 | 40.0% | — | 1,476 | 0 | 0 |
| 1978 | 6–7 | 46.2% | — | 1,594 | 0 | 0 | — | — | — | — | — | — | — |
| 1979 | 8–9 | 47.1% | — | 1,594 | 0 | 0 | — | — | — | — | — | — | — |
| 1980 | 11–10 | 52.4% | — | 1,592 | 0 | 0 | — | — | — | — | — | — | — |
| 1981 | 1–6 | 14.3% | — | 1,531 | 0 | 0 | — | — | — | — | — | — | — |
| 1982 | 0–1 | 0.0% | — | 1,520 | 0 | 0 | — | — | — | — | — | — | — |
| 1983 | 0–4 | 0.0% | — | 1,467 | 0 | 0 | — | — | — | — | — | — | — |
| 1984 | 0–1 | 0.0% | — | 1,458 | 0 | 0 | — | — | — | — | — | — | — |
| 1987 | 0–1 | 0.0% | — | 1,451 | 0 | 0 | — | — | — | — | — | — | — |
Surface Results by Career Season
Rows are aligned in career order because complete birth data is unavailable. 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.
| Naoko Sato | Monica Simmen | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | ||
| 1972 | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | 2 | 1 | 3 | 66.7% | 1976 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 1973 | — | — | — | — | 2 | 4 | 6 | 33.3% | 2 | 2 | 4 | 50.0% | — | — | — | — | 1977 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 2 | 5 | 60.0% |
| 1974 | 2 | 2 | 4 | 50.0% | 1 | 6 | 7 | 14.3% | 2 | 4 | 6 | 33.3% | 0 | 1 | 1 | 0.0% | 1978 | — | — | — | — | 0 | 1 | 1 | 0.0% | 0 | 2 | 2 | 0.0% | 1 | 1 | 2 | 50.0% |
| 1975 | — | — | — | — | 3 | 2 | 5 | 60.0% | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | 1979 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 2 | 50.0% |
| 1976 | — | — | — | — | 0 | 4 | 4 | 0.0% | 4 | 4 | 8 | 50.0% | — | — | — | — | 1980 | — | — | — | — | 1 | 2 | 3 | 33.3% | — | — | — | — | 1 | 1 | 2 | 50.0% |
| 1977 | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | 7 | 9 | 16 | 43.8% | — | — | — | — | 1981 | — | — | — | — | 1 | 4 | 5 | 20.0% | — | — | — | — | — | — | — | — |
| 1978 | — | — | — | — | 1 | 2 | 3 | 33.3% | 5 | 4 | 9 | 55.6% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1979 | 0 | 2 | 2 | 0.0% | — | — | — | — | 4 | 5 | 9 | 44.4% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1980 | 1 | 1 | 2 | 50.0% | 4 | 4 | 8 | 50.0% | 3 | 4 | 7 | 42.9% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1981 | 0 | 3 | 3 | 0.0% | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1982 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1983 | 0 | 1 | 1 | 0.0% | — | — | — | — | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1984 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1987 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 3 | 11 | 14 | 21.4% | 13 | 27 | 40 | 32.5% | 27 | 40 | 67 | 40.3% | 2 | 4 | 6 | 33.3% | Career | — | — | — | — | 2 | 8 | 10 | 20.0% | 0 | 2 | 2 | 0.0% | 6 | 5 | 11 | 54.5% |
Advanced Statistics Comparison by Career Season
Rows are aligned in career order because complete birth data is unavailable. 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.
| Naoko Sato | Monica Simmen | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 1972 | 1505 | 88.1 | — | — | — | — | +47 | — | — | 36.4% | -2.00 | 1–0 | 1–0 | — | +0.31 | 1976 | 1494 | 98.7 | — | — | — | — | — | — | — | 0.0% | -5.00 | — | — | — | +0.01 |
| 1973 | 1496 | 92.8 | — | — | — | — | — | -8 | +52 | 40.9% | -1.41 | 1–1 | — | — | +1.13 | 1977 | 1534 | 102.3 | — | — | — | — | +85 | — | — | 53.8% | +0.08 | 2–1 (67%) | 1–2 (33%) | 100.8 | +1.20 |
| 1974 | 1453 | 91.0 | — | — | — | — | +95 | -59 | +77 | 34.0% | -1.11 | 3–4 (43%) | 1–3 (25%) | 97.2 | +1.33 | 1978 | 1483 | 93.6 | — | — | — | — | — | — | — | 16.7% | -2.67 | — | — | — | +0.76 |
| 1975 | 1493 | 95.6 | — | — | — | — | — | -27 | — | 40.7% | -1.33 | 2–1 (67%) | 1–1 | — | +0.98 | 1979 | 1483 | 95.1 | — | — | — | — | — | — | — | 50.0% | -1.00 | — | — | — | +0.77 |
| 1976 | 1530 | 116.3 | — | — | — | — | — | -82 | +48 | 28.0% | -1.64 | 2–1 (67%) | — | — | -0.39 | 1980 | 1488 | 106.9 | — | — | — | — | — | -4 | — | 45.5% | 0.00 | 0–1 | — | — | +0.72 |
| 1977 | 1567 | 121.7 | — | — | — | — | — | -112 | +16 | 43.8% | -0.69 | 3–5 (38%) | 3–1 (75%) | 101.1 | +1.63 | 1981 | 1477 | 102.8 | — | — | — | — | — | -8 | — | 43.5% | -0.35 | 1–2 (33%) | 2–0 | — | +0.33 |
| 1978 | 1595 | 111.7 | — | — | — | — | — | -138 | +17 | 48.3% | -0.17 | 1–2 (33%) | 1–1 | — | +0.54 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1979 | 1594 | 114.4 | — | — | — | — | — | — | +13 | 47.4% | +0.05 | 2–2 (50%) | 1–1 | — | +1.58 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1980 | 1593 | 108.7 | — | — | — | — | — | -117 | -11 | 53.2% | +0.30 | 2–3 (40%) | 1–1 | — | +1.74 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1981 | 1531 | 97.3 | — | — | — | — | -43 | -32 | — | 23.5% | -1.88 | 1–2 (33%) | 1–1 | — | +0.51 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1982 | 1520 | 99.4 | — | — | — | — | — | — | — | 0.0% | -2.00 | — | — | — | +0.01 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1983 | 1467 | 93.8 | — | — | — | — | — | — | — | 11.1% | -1.89 | 0–1 | — | — | +0.48 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1984 | 1459 | 102.4 | — | — | — | — | — | — | — | 0.0% | -1.50 | — | 0–1 | — | -0.02 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1987 | 1451 | 91.3 | — | — | — | — | — | — | — | 0.0% | -5.50 | — | — | — | -0.06 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1629 | 106.1 | — | — | — | — | +45 | -69 | +25 | 39.8% | -0.84 | 18–22 (45%) | 10–10 (50%) | 101.4 | +6.65 | Career | 1548 | 100.4 | — | — | — | — | +85 | -7 | — | 40.0% | -0.82 | 3–4 (43%) | 3–2 (60%) | 100.1 | +13.07 |
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.
Monica Simmen
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Marcela Skuherska | 0 | 2 | 2 | Apr 20, 1981 | H2H |
| Kerstin Seelbach | 2 | 0 | 2 | Mar 14, 1980 | H2H |
| Monique Van Haver | 1 | 1 | 2 | Apr 7, 1978 | H2H |
| Nina Bohm | 0 | 1 | 1 | Apr 20, 1981 | H2H |
| Barbara Rossi | 0 | 1 | 1 | Apr 20, 1981 | H2H |