H2H data updated: 2026-09-12 00:00 UTC
Isabelle Villiger holds a 1–0 lead over Sandy Stap in their WTA head-to-head. Across 1 main-draw meeting, Isabelle Villiger leads 1–0 on clay. Most recently, Isabelle Villiger won the 1978 Barcelona round of 64 6-2 6-3.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Isabelle Villiger | 6-2 6-3 | Sandy Stap | Match data | Oct 11, 1978* | R64 | Barcelona | WTA 250 | Clay |
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.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Isabelle Villiger | — | — | — | 1,686 | 24 | 31 | 43.6% | 0 | 0 | 0 | 0 | 1 | 1 |
| Sandy Stap | — | — | — | 1,635 | 25 | 33 | 43.1% | 0 | 0 | 0 | 0 | 1 | 1 |
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 | Isabelle Villiger | Sandy Stap | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 15 | — | — | — | — | — | — | — | 1971 | 0–2 | 0.0% | — | 1,482 | 0 | 0 |
| 16 | — | — | — | — | — | — | — | 1972 | 2–4 | 33.3% | — | 1,493 | 0 | 0 |
| 17 | — | — | — | — | — | — | — | 1973 | 2–6 | 25.0% | — | 1,446 | 0 | 0 |
| 18 | — | — | — | — | — | — | — | 1974 | 7–7 | 50.0% | — | 1,508 | 0 | 0 |
| 19 | — | — | — | — | — | — | — | 1975 | 10–7 | 58.8% | — | 1,615 | 0 | 1 |
| 20 | 1972 | 0–1 | 0.0% | — | 1,484 | 0 | 0 | 1976 | 0–1 | 0.0% | — | 1,594 | 0 | 1 |
| 22 | — | — | — | — | — | — | — | 1978 | 3–3 | 50.0% | — | 1,579 | 0 | 1 |
| 23 | — | — | — | — | — | — | — | 1979 | 1–3 | 25.0% | — | 1,541 | 0 | 1 |
| 26 | 1978 | 2–2 | 50.0% | — | 1,499 | 0 | 0 | — | — | — | — | — | — | — |
| 27 | 1979 | 0–2 | 0.0% | — | 1,477 | 0 | 0 | — | — | — | — | — | — | — |
| 28 | 1980 | 13–6 | 68.4% | — | 1,644 | 0 | 1 | — | — | — | — | — | — | — |
| 29 | 1981 | 9–16 | 36.0% | — | 1,641 | 0 | 1 | — | — | — | — | — | — | — |
| 30 | 1982 | 0–3 | 0.0% | — | 1,595 | 0 | 1 | — | — | — | — | — | — | — |
| 31 | 1983 | 0–1 | 0.0% | — | 1,582 | 0 | 1 | — | — | — | — | — | — | — |
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 | Isabelle Villiger | Sandy Stap | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1971 | — | — | — | — | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1972 | — | — | — | — | 1 | 1 | 2 | 50.0% | 1 | 3 | 4 | 25.0% | — | — | — | — |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1973 | 1 | 2 | 3 | 33.3% | 1 | 3 | 4 | 25.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1974 | — | — | — | — | 4 | 4 | 8 | 50.0% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% |
| 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1975 | — | — | — | — | 1 | 3 | 4 | 25.0% | 5 | 0 | 5 | 100.0% | — | — | — | — |
| 20 | 1972 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 1976 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 22 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1978 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1979 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | 0 | 2 | 2 | 0.0% |
| 26 | 1978 | — | — | — | — | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 1979 | — | — | — | — | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 1980 | — | — | — | — | 8 | 3 | 11 | 72.7% | — | — | — | — | 5 | 3 | 8 | 62.5% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 1981 | — | — | — | — | 7 | 7 | 14 | 50.0% | 0 | 4 | 4 | 0.0% | 2 | 5 | 7 | 28.6% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | 1982 | — | — | — | — | 0 | 3 | 3 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | 1983 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | — | — | — | — | 17 | 18 | 35 | 48.6% | 0 | 5 | 5 | 0.0% | 7 | 8 | 15 | 46.7% | — | 2 | 3 | 5 | 40.0% | 7 | 14 | 21 | 33.3% | 6 | 6 | 12 | 50.0% | 0 | 3 | 3 | 0.0% |
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 | Isabelle Villiger | Sandy Stap | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1971 | 1482 | 103.5 | — | — | — | — | — | — | — | 20.0% | -0.80 | 0–1 | — | — | +0.01 |
| 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1972 | 1493 | 112.1 | — | — | — | — | — | — | +17 | 35.7% | -0.86 | 1–1 | — | — | +0.03 |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1973 | 1446 | 101.0 | — | — | — | — | +92 | +47 | — | 27.8% | -0.89 | 1–1 | 0–1 | — | +1.70 |
| 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1974 | 1509 | 118.2 | — | — | — | — | — | +31 | — | 53.1% | +0.56 | 1–3 (25%) | 0–1 | — | +0.89 |
| 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1975 | 1615 | 126.2 | — | — | — | — | — | -83 | -11 | 59.0% | +0.36 | 2–3 (40%) | 2–1 (67%) | 101.9 | +0.52 |
| 20 | 1972 | 1484 | — | — | — | — | — | — | — | — | — | — | — | — | — | +0.25 | 1976 | 1595 | 99.7 | — | — | — | — | — | — | — | 33.3% | -0.33 | 0–1 | — | — | +0.15 |
| 22 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1978 | 1580 | 104.8 | — | — | — | — | — | — | — | 46.7% | +0.20 | 2–1 (67%) | 1–1 | — | +0.18 |
| 23 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1979 | 1541 | 95.0 | — | — | — | — | -5 | — | — | 33.3% | -0.89 | 0–1 | — | — | +1.26 |
| 26 | 1978 | 1500 | 101.6 | — | — | — | — | — | +18 | — | 50.0% | -0.25 | — | — | — | +0.34 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 1979 | 1478 | 100.1 | — | — | — | — | — | — | — | 0.0% | -3.00 | — | — | — | +0.24 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 1980 | 1645 | 121.5 | — | — | — | — | -22 | +2 | — | 66.7% | +0.77 | 1–2 (33%) | 1–1 | — | +2.69 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 29 | 1981 | 1641 | 119.5 | — | — | — | — | -4 | +42 | -128 | 40.0% | -1.27 | 4–6 (40%) | 4–1 (80%) | 100.7 | -0.74 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | 1982 | 1596 | 102.7 | — | — | — | — | — | +8 | — | 14.3% | -2.00 | 0–1 | 0–1 | — | -0.06 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | 1983 | 1583 | — | — | — | — | — | — | — | — | — | — | — | — | — | +0.31 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1687 | 119.2 | — | — | — | — | -14 | +22 | -128 | 46.5% | -0.64 | 5–9 (36%) | 5–3 (63%) | 98.5 | +5.51 | — | 1636 | 118.0 | — | — | — | — | +37 | +7 | +1 | 45.9% | -0.05 | 7–12 (37%) | 3–4 (43%) | 96.0 | +8.17 |
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Mima Jausovec | 0 | 3 | 3 | Oct 30, 1981 | H2H |
| Petra Delhees Jauch | 1 | 1 | 2 | Nov 13, 1980 | H2H |
| Brigitte Simon Glinel | 0 | 2 | 2 | Apr 6, 1980 | H2H |
| Gail Sherriff | 1 | 1 | 2 | Apr 5, 1980 | H2H |
| Sabina Simmonds | 0 | 1 | 1 | Jul 9, 1983 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Betsy Nagelsen | 1 | 1 | 2 | Apr 1, 1979 | H2H |
| Susan Hagey | 2 | 0 | 2 | Feb 17, 1978 | H2H |
| Barbara Downs | 1 | 1 | 2 | Jul 25, 1975 | H2H |
| Cecilia Martinez | 0 | 2 | 2 | Jul 4, 1975 | H2H |
| Joanne Russell | 0 | 2 | 2 | Jul 12, 1974 | H2H |