H2H data updated: 2026-07-19 02:51 UTC
Jeff Borowiak vs Willem Prinsloo H2H: 1-1
Jeff Borowiak and Willem Prinsloo are tied 1–1 in their ATP head-to-head. Across 2 main-draw meetings, they are tied 1–1 on clay. Most recently, Willem Prinsloo won the 1977 US Open first round 3-6 7-6 6-1.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
USA
Age 76
Right-Handed
193 cm / 6'4"
H2H
1
–
1
2 main draw meetings
RSA
Left-Handed
H2H Match Log
| Date | Tournament | Category | Round | Surface | Winner | Score | Loser | Match |
|---|---|---|---|---|---|---|---|---|
| Sep 2, 1977* | US Open | Grand Slam | R128 | Clay | Willem Prinsloo | 3-6 7-6 6-1 | Jeff Borowiak | Match data |
| Jul 6, 1977* | Gstaad | ATP 250 | R32 | Clay | Jeff Borowiak | 6-1 6-3 | Willem Prinsloo | Match data |
* Estimated match date where the exact historical date is unavailable.
Career Comparison
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 | Finals | 500 | 250 | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jeff Borowiak | #920 | #20 | 0 | 1,941 | 289 | 305 | 48.7% | 0 | 1 | 0 | 0 | 4 | 5 |
| Willem Prinsloo | #332 | #81 | 0 | 1,549 | 13 | 33 | 28.3% | 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 | Jeff Borowiak | Willem Prinsloo | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 17 | — | — | — | — | — | — | — | 1971 | 1–1 | 50.0% | — | 1,516 | 0 | 0 |
| 18 | 1968 | 6–10 | 37.5% | — | 1,471 | 0 | 0 | 1972 | 0–1 | 0.0% | — | 1,488 | 0 | 0 |
| 19 | 1969 | 3–2 | 60.0% | — | 1,512 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 1970 | 6–7 | 46.2% | — | 1,566 | 0 | 0 | — | — | — | — | — | — | — |
| 21 | 1971 | 26–20 | 56.5% | — | 1,782 | 0 | 0 | 1975 | 1–1 | 50.0% | #282 | 1,491 | 0 | 0 |
| 22 | 1972 | 20–28 | 41.7% | — | 1,828 | 0 | 0 | 1976 | 3–1 | 75.0% | #154 | 1,546 | 0 | 0 |
| 23 | 1973 | 21–33 | 38.9% | #82 | 1,732 | 0 | 0 | 1977 | 4–15 | 21.1% | #144 | 1,500 | 0 | 0 |
| 24 | 1974 | 34–27 | 55.7% | #40 | 1,853 | 0 | 2 | 1978 | 3–5 | 37.5% | #122 | 1,499 | 0 | 0 |
| 25 | 1975 | 32–27 | 54.2% | #48 | 1,804 | 0 | 2 | 1979 | 1–9 | 10.0% | #265 | 1,427 | 0 | 0 |
| 26 | 1976 | 18–23 | 43.9% | #60 | 1,720 | 0 | 2 | — | — | — | — | — | — | — |
| 27 | 1977 | 45–23 | 66.2% | #25 | 1,812 | 0 | 5 | — | — | — | — | — | — | — |
| 28 | 1978 | 16–25 | 39.0% | #98 | 1,671 | 0 | 5 | — | — | — | — | — | — | — |
| 29 | 1979 | 5–13 | 27.8% | #125 | 1,614 | 0 | 5 | — | — | — | — | — | — | — |
| 30 | 1980 | 5–5 | 50.0% | #189 | 1,668 | 0 | 5 | — | — | — | — | — | — | — |
| 31 | 1981 | 18–19 | 48.6% | #52 | 1,763 | 0 | 5 | — | — | — | — | — | — | — |
| 32 | 1982 | 21–20 | 51.2% | #94 | 1,740 | 0 | 5 | — | — | — | — | — | — | — |
| 33 | 1983 | 13–19 | 40.6% | #98 | 1,651 | 0 | 5 | — | — | — | — | — | — | — |
| 34 | 1984 | 0–4 | 0.0% | #520 | 1,598 | 0 | 5 | — | — | — | — | — | — | — |