Player data updated: 2026-09-01 02:16 UTC

Willem Prinsloo

RSA Died Jan 1, 2018 (age 63) Plays: Left-Handed ATP Tour years active: 1971–1979

Willem Prinsloo represented South Africa on the ATP Tour and reached a career-high ranking of No. 81. In TennisDB's records, Willem Prinsloo finished with a career record of 13–33 and no singles titles.

Peak ranking

81 (Jul 3, 1977)

Elo peak

1550 (18th percentile)

Career record

13–33 (28.3%)

Career titles

Records cover recorded main-draw singles results in TennisDB's ATP event archive, including credited walkovers; qualifying is shown separately below.

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ATP Matches full match log →

Willem Prinsloo's recent, live, and scheduled ATP matches
Opponent	Score	Result	H2H	Match Data	Date	Round	Tournament	Category	Surface
Pascal Portes #71	5-7 3-6	L	H2H	Match data	Nov 30, 1979*	R32	South African Open	ATP 250	Hard
Tom Gullikson	3-6 4-6 2-6	L	—	Match data	Aug 30, 1979*	R128	US Open	Grand Slam	Hard
Gene Malin	3-6 6-2 2-6	L	H2H	Match data	Aug 16, 1979*	R32	Cleveland	ATP 250	Hard
Bob Lutz	2-6 2-6	L	H2H	Match data	Aug 9, 1979*	R32	Colombus	ATP 250	Clay
Chris Kachel	4-6 6-3 1-6	L	H2H	Match data	Aug 2, 1979*	R32	South Orange	ATP 250	Clay

Rivals all rivalries →

Willem Prinsloo's most-played ATP rivals
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

Career Results

Willem Prinsloo career results by season
Season	Age	W	L	M	Win %	Start Rank	End Rank
1971	17	1	1	2	50.0%	—	—
1972	18	0	1	1	0.0%	—	—
1975	21	1	1	2	50.0%	300	282
1976	22	3	1	4	75.0%	154	154
1977	23	4	15	19	21.1%	89	97
1978	24	3	5	8	37.5%	144	122
1979	25	1	9	10	10.0%	265	265
Career		13	33	46	28.3%	—	—

Career Results by Surface

Willem Prinsloo career results by season and surface
Season	Age	Hard				Clay				Grass				Carpet				Total
Season	Age	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %
1971	17	1	1	2	50.0%	—	—	—	—	—	—	—	—	—	—	—	—	1	1	2	50.0%
1972	18	0	1	1	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	0	1	1	0.0%
1975	21	—	—	—	—	1	1	2	50.0%	—	—	—	—	—	—	—	—	1	1	2	50.0%
1976	22	3	1	4	75.0%	—	—	—	—	—	—	—	—	—	—	—	—	3	1	4	75.0%
1977	23	1	1	2	50.0%	3	12	15	20.0%	0	2	2	0.0%	—	—	—	—	4	15	19	21.1%
1978	24	2	3	5	40.0%	—	—	—	—	—	—	—	—	1	2	3	33.3%	3	5	8	37.5%
1979	25	1	5	6	16.7%	0	3	3	0.0%	—	—	—	—	0	1	1	0.0%	1	9	10	10.0%
Career	—	8	12	20	40.0%	4	16	20	20.0%	0	2	2	0.0%	1	3	4	25.0%	13	33	46	28.3%

Career Results by Opponent Rank

Willem Prinsloo career results by season and opponent rank
Season	Age	1-10				11-30				31-100				100+				Total
Season	Age	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %
1977	23	0	1	1	0.0%	1	3	4	25.0%	0	2	2	0.0%	0	0	—	—	1	6	7	14.3%
1978	24	0	0	—	—	0	1	1	0.0%	0	1	1	0.0%	0	0	—	—	0	2	2	0.0%
1979	25	0	0	—	—	0	0	—	—	0	2	2	0.0%	0	0	—	—	0	2	2	0.0%
Career		0	1	1	0.0%	1	4	5	20.0%	0	5	5	0.0%	0	0	—	—	1	10	11	9.1%

Opponent ranking data available for 11/46 (23.9%) of Willem Prinsloo's ATP main draw matches.

Advanced Stats

Willem Prinsloo advanced statistics by season
Season	Age	Elo	P+	Serve+	Return+	PD	TPW%	Hard Elo	Clay Elo	Grass Elo	Set Win %	Set Margin	Dec. Set	Tiebreak	Pressure+	Schedule
1971	17	1517	101.3	—	—	—	—	—	—	—	42.9%	-0.71	—	0–1	—	-0.26
1972	18	1488	98.1	—	—	—	—	—	—	—	25.0%	-0.75	—	—	—	+0.04
1975	21	1491	103.1	—	—	—	—	—	—	—	60.0%	+0.60	0–1	1–0	—	+0.33
1976	22	1547	115.5	—	—	—	—	+58	—	—	66.7%	+1.00	1–0	—	—	+0.34
1977	23	1503	110.5	—	—	—	—	—	+2	—	23.3%	-2.23	1–2 (33%)	2–1 (67%)	101.4	+0.24
1978	24	1501	102.5	—	—	—	—	+87	—	—	36.8%	-1.26	2–1 (67%)	2–0	—	+1.33
1979	25	1428	101.7	—	—	—	—	+79	+29	—	26.9%	-1.69	0–5 (0%)	—	—	+0.82
Career		1550	109.6	—	—	—	—	+78	+7	—	32.7%	-1.41	4–9 (31%)	5–2 (71%)	97.4	+6.17

Tournament Results by Category

Grand Slams

Willem Prinsloo Grand Slams results by season
Season	Age	RG	W	USO	W-L Win %
1977	23	R128	R128	R64	1–3 (25%)
1978	24	—	—	R64	1–1 (50%)
1979	25	—	—	R128	0–1 (0%)
W-L		0–1 (0%)	0–1 (0%)	2–3 (40%)	2–5 (29%)

ATP 250

Willem Prinsloo ATP 250 results by season
Season	Age	ATL	GST	AUS	PAR	QUE	WAS	BRU	CLE	COL	COL	HAR	JOH	LIT	LOU	NIC	NOR	SAN	SAR	SOU	SOU	CAN	U.S	W-L Win %
1971	17	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	R64	—	—	—	1–1 (50%)
1972	18	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	R128	—	—	—	0–1 (0%)
1975	21	—	—	—	—	—	—	—	—	—	—	—	—	—	—	R32	—	—	—	—	—	—	—	1–1 (50%)
1976	22	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	QF	—	—	—	3–1 (75%)
1977	23	—	R32	R32	R32	R64	R64	R32	—	—	R32	—	—	—	R64	—	R64	—	—	R16	—	R32	R64	3–12 (20%)
1978	24	R32	—	—	—	—	—	—	R16	—	—	R16	—	—	—	—	—	R64	—	—	—	—	—	2–4 (33%)
1979	25	—	—	—	—	—	R64	—	R32	R32	—	—	R16	R32	—	—	—	—	R32	R32	R32	—	—	1–8 (11%)
W-L		0–1 (0%)	0–1 (0%)	0–1 (0%)	0–1 (0%)	0–1 (0%)	0–2 (0%)	0–1 (0%)	1–2 (33%)	0–1 (0%)	1–1 (50%)	1–1 (50%)	1–1 (50%)	0–1 (0%)	0–1 (0%)	1–1 (50%)	0–1 (0%)	0–1 (0%)	0–1 (0%)	5–5 (50%)	0–1 (0%)	1–1 (50%)	0–1 (0%)	11–28 (28%)

Results show the best round reached per tournament and season.

ATP Ranking History full ranking history →

Career high

Career-high date

Jul 3, 1977

First Top 100

May 23, 1977

First Top 50

—

First Top 20

—

First Top 10

—

Ranking History Matrix

Willem Prinsloo ranking history by month and season
Season	Age	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1975	21	—	—	—	—	—	300	—	—	—	—	—	282
1976	22	—	—	—	—	—	—	—	—	—	—	—	154
1977	23	—	—	—	—	89	85	87	93	97	99	97	—
1978	24	140	—	—	—	—	—	99	97	96	—	—	122
1979	25	—	—	—	—	—	—	—	—	—	—	—	265
1982	28	332	—	—	—	—	—	—	—	—	—	—	—

Similar Players

Other ATP players with comparable peak level, era, career record, and career scale.

Willem Prinsloo's most statistically similar ATP players
Player	Country	Peak Rank	Peak Elo	M	W	L	Win %	Years	Match Log
Alvin Gardiner	AUS	77	1,524	143	43	100	30.1%	1968–1981	Match log
Jean Baptiste Chanfreau	FRA	80	1,677	189	61	128	32.3%	1968–1979	Match log
Rolf Thung	NED	86	1,532	89	21	68	23.6%	1968–1980	Match log
Robert Trogolo	RSA	83	1,590	26	10	16	38.5%	1971–1980	Match log
Gustavo Guerrero	ARG	78	1,521	26	6	20	23.1%	1971–1987	Match log
Alvaro Betancur	COL	89	1,600	112	34	78	30.4%	1968–1981	Match log
Mike Machette	USA	90	1,568	119	33	86	27.7%	1968–1979	Match log
Chris Kachel	AUS	77	1,614	118	32	86	27.1%	1973–1980	Match log
John Paish	GBR	80	1,690	111	43	68	38.7%	1968–1980	Match log
Sashi Menon	IND	82	1,653	264	89	175	33.7%	1970–1985	Match log
Jun Kuki	JPN	78	1,662	207	73	134	35.3%	1968–1982	Match log
Javier Soler	ESP	74	1,655	79	27	52	34.2%	1971–1984	Match log

Frequently Asked Questions

Which country does Willem Prinsloo represent?: Willem Prinsloo represents South Africa in TennisDB's ATP records.
Is Willem Prinsloo left-handed or right-handed?: Willem Prinsloo plays left-handed.
How many Grand Slams has Willem Prinsloo won?: Willem Prinsloo has not won a Grand Slam title.
How many Masters 1000 titles has Willem Prinsloo won?: TennisDB does not group any of Willem Prinsloo's titles under the modern Masters 1000 category.
What is Willem Prinsloo's highest ATP ranking?: Willem Prinsloo's career-high ATP singles ranking is world No. 81, first achieved on July 3, 1977.
What is Willem Prinsloo's career win-loss record?: Willem Prinsloo has a career ATP singles record of 13 wins and 33 losses (28.3%).
Which seasons of Willem Prinsloo's career appear in TennisDB?: Willem Prinsloo appears in TennisDB's ATP main-tour match records from 1971 through 1979.
On which surface does Willem Prinsloo have the highest recorded win rate?: Among surfaces with at least 20 recorded matches, Willem Prinsloo's highest ATP main-draw win rate is on hard: 40.0% (8–12).
Who has Willem Prinsloo faced most often?: Willem Prinsloo's most frequent opponent is Bob Lutz, with a head-to-head record of 0–2 across 2 meetings.