Willem Prinsloo
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Bob Lutz | 0 | 2 | 2 | Aug 9, 1979 | H2H |
| Onny Parun | 1 | 1 | 2 | Sep 4, 1977 | H2H |
| Jeff Borowiak | 1 | 1 | 2 | Sep 2, 1977 | H2H |
| John Alexander | 0 | 2 | 2 | Aug 19, 1977 | H2H |
| Harold Solomon | 0 | 2 | 2 | Aug 2, 1977 | H2H |
H2H data updated: 2026-10-18 00:00 UTC
Willem Prinsloo vs S Sullivan H2H: 1-0
Willem Prinsloo holds a 1–0 lead over S Sullivan in their ATP head-to-head. Across 1 main-draw meeting, Willem Prinsloo leads 1–0 on hard courts. Most recently, Willem Prinsloo won the 1976 South African Open round of 16 6-1 4-6 6-2.
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 |
|---|---|---|---|---|---|---|---|---|
| Willem Prinsloo | 6-1 4-6 6-2 | S Sullivan | Match data | Nov 27, 1976* | R16 | South African 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Willem Prinsloo | #332 | #81 | 0 | 1,549 | 13 | 33 | 28.3% | 0 | 0 | 0 | 0 | 0 | 0 |
| S Sullivan | — | — | — | 1,516 | — | — | — | 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.
| Willem Prinsloo | S Sullivan | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1971 | 1–1 | 50.0% | — | 1,516 | 0 | 0 | — | — | — | — | — | — | — |
| 1972 | 0–1 | 0.0% | — | 1,488 | 0 | 0 | — | — | — | — | — | — | — |
| 1975 | 1–1 | 50.0% | #282 | 1,491 | 0 | 0 | — | — | — | — | — | — | — |
| 1976 | 3–1 | 75.0% | #154 | 1,547 | 0 | 0 | — | — | — | — | — | — | — |
| 1977 | 4–15 | 21.1% | #97 | 1,502 | 0 | 0 | — | — | — | — | — | — | — |
| 1978 | 3–5 | 37.5% | #122 | 1,501 | 0 | 0 | — | — | — | — | — | — | — |
| 1979 | 1–9 | 10.0% | #265 | 1,428 | 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.
| Willem Prinsloo | S Sullivan | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | ||
| 1971 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | 1976 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 1972 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1975 | — | — | — | — | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1976 | 3 | 1 | 4 | 75.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1977 | 1 | 1 | 2 | 50.0% | 3 | 12 | 15 | 20.0% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1978 | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1979 | 1 | 5 | 6 | 16.7% | 0 | 3 | 3 | 0.0% | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 8 | 12 | 20 | 40.0% | 4 | 16 | 20 | 20.0% | 0 | 2 | 2 | 0.0% | 1 | 3 | 4 | 25.0% | Career | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — |
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.
| Willem Prinsloo | S Sullivan | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 1971 | 1517 | 101.3 | — | — | — | — | — | — | — | 42.9% | -0.71 | — | 0–1 | — | -0.26 | 1976 | 1501 | 99.9 | — | — | — | — | — | — | — | 50.0% | -0.33 | 1–1 | — | — | +0.53 |
| 1972 | 1488 | 98.1 | — | — | — | — | — | — | — | 25.0% | -0.75 | — | — | — | +0.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1975 | 1491 | 103.0 | — | — | — | — | — | — | — | 60.0% | +0.60 | 0–1 | 1–0 | — | +0.33 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1976 | 1547 | 115.5 | — | — | — | — | +58 | — | — | 66.7% | +1.00 | 1–0 | — | — | +0.34 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1977 | 1503 | 110.5 | — | — | — | — | — | +2 | — | 23.3% | -2.23 | 1–2 (33%) | 2–1 (67%) | 101.4 | +0.24 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1978 | 1501 | 102.5 | — | — | — | — | +87 | — | — | 36.8% | -1.26 | 2–1 (67%) | 2–0 | — | +1.33 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1979 | 1428 | 101.7 | — | — | — | — | +79 | +29 | — | 26.9% | -1.69 | 0–5 (0%) | — | — | +0.82 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1549 | 109.6 | — | — | — | — | +78 | +7 | — | 32.7% | -1.41 | 4–9 (31%) | 5–2 (71%) | 97.4 | +6.17 | Career | 1516 | 100.0 | — | — | — | — | — | — | — | 50.0% | -0.33 | 1–1 | — | — | +26.50 |
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.
S Sullivan
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Willem Prinsloo | 0 | 1 | 1 | Nov 27, 1976 | — |
| Robbie Venter | 1 | 0 | 1 | Nov 26, 1976 | — |