Siobhan Nicholson
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Joy Tacon | 0 | 2 | 2 | Jul 10, 1982 | H2H |
| Belinda Borneo | 1 | 0 | 1 | Aug 1, 1982 | H2H |
| Jane Plackett | 1 | 0 | 1 | Jul 10, 1982 | H2H |
| J Sculthorpe | 0 | 1 | 1 | Jul 16, 1981 | H2H |
| E Cowan | 1 | 0 | 1 | Jul 9, 1981 | H2H |
H2H data updated: 2026-09-12 00:00 UTC
Siobhan Nicholson vs E Cowan H2H: 1-0
Siobhan Nicholson holds a 1–0 lead over E Cowan in their WTA head-to-head. Across 1 main-draw meeting, Siobhan Nicholson leads 1–0 on grass. Most recently, Siobhan Nicholson won the 1981 Felixstowe round of 32 6-1 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 Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Siobhan Nicholson | 6-1 6-4 | E Cowan | Match data | Jul 9, 1981* | R32 | Felixstowe | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Siobhan Nicholson | — | — | — | 1,503 | 3 | 4 | 42.9% | 0 | 0 | 0 | 0 | 1 | 1 |
| E Cowan | — | — | — | 1,500 | 0 | 1 | 0.0% | 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.
| Siobhan Nicholson | E Cowan | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1981 | 1–3 | 25.0% | — | 1,466 | 0 | 0 | 1981 | 0–1 | 0.0% | — | 1,483 | 0 | 0 |
| 1982 | 2–1 | 66.7% | — | 1,489 | 0 | 1 | — | — | — | — | — | — | — |
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.
| Siobhan Nicholson | E Cowan | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Yr | Grass | Yr | Grass | ||||||
| W | L | M | Win % | W | L | M | Win % | ||
| 1981 | 1 | 1 | 2 | 50.0% | 1981 | 0 | 1 | 1 | 0.0% |
| 1982 | 1 | 1 | 2 | 50.0% | — | — | — | — | — |
| Career | 2 | 2 | 4 | 50.0% | Career | 0 | 1 | 1 | 0.0% |
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.
| Siobhan Nicholson | E Cowan | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 1981 | 1467 | 95.3 | — | — | — | — | — | — | — | 25.0% | -1.63 | — | — | — | +0.55 | 1981 | 1483 | 96.5 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | +0.22 |
| 1982 | 1489 | 102.5 | — | — | — | — | — | — | — | 62.5% | +0.50 | 1–1 | 1–0 | — | +0.47 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1503 | 98.8 | — | — | — | — | — | — | — | 43.8% | -0.57 | 1–1 | 1–0 | — | +14.57 | Career | 1500 | 98.2 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | +22.00 |
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.
E Cowan
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Siobhan Nicholson | 0 | 1 | 1 | Jul 9, 1981 | H2H |