H2H data updated: 2026-09-12 00:00 UTC

Betsy Nagelsen vs Sandy Stap H2H: 1-1

Betsy Nagelsen and Sandy Stap are tied 1–1 in their WTA head-to-head. Across 2 main-draw meetings, Sandy Stap leads 1–0 on clay, while Betsy Nagelsen leads 1–0 on hard courts. Most recently, Betsy Nagelsen won the 1979 Carlsbad round of 16 6-4 7-5.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Betsy Nagelsen

USA Age 69 Right-Handed 175 cm / 5'9"

H2H

1 – 1

2 main-draw meetings

Sandy Stap

USA Age 70 Right-Handed

H2H Match Log

Player	Score	Player	Match Data	Date	Round	Tournament	Category	Surface
Betsy Nagelsen	6-4 7-5	Sandy Stap	Match data	Apr 1, 1979*	R16	Carlsbad	WTA 500	Hard
Sandy Stap	3-6 7-5 6-2	Betsy Nagelsen	Match data	Mar 14, 1974*	R32	Ocala	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.

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
Betsy Nagelsen	#692	#25	28	1,890	266	324	45.1%	0	0	0	0	6	6
Sandy Stap	—	—	—	1,635	25	33	43.1%	0	0	0	0	1	1

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	Betsy Nagelsen							Sandy Stap
Age	Yr	W-L	Win %	Rank	Elo	GS	Titles	Yr	W-L	Win %	Rank	Elo	GS	Titles
15	1972	4–2	66.7%	—	1,511	0	1	1971	0–2	0.0%	—	1,482	0	0
16	1973	1–3	25.0%	—	1,494	0	1	1972	2–4	33.3%	—	1,493	0	0
17	1974	27–18	60.0%	—	1,724	0	3	1973	2–6	25.0%	—	1,446	0	0
18	1975	18–17	51.4%	—	1,790	0	3	1974	7–7	50.0%	—	1,508	0	0
19	1976	11–19	36.7%	—	1,709	0	3	1975	10–7	58.8%	—	1,615	0	1
20	1977	8–15	34.8%	—	1,678	0	3	1976	0–1	0.0%	—	1,594	0	1
21	1978	13–24	35.1%	—	1,659	0	3	—	—	—	—	—	—	—
22	1979	18–19	48.6%	—	1,694	0	5	1978	3–3	50.0%	—	1,579	0	1
23	1980	22–27	44.9%	—	1,753	0	5	1979	1–3	25.0%	—	1,541	0	1
24	1981	20–21	48.8%	—	1,806	0	6	—	—	—	—	—	—	—
25	1982	12–17	41.4%	—	1,705	0	6	—	—	—	—	—	—	—
26	1983	18–22	45.0%	—	1,692	0	6	—	—	—	—	—	—	—
27	1984	11–18	37.9%	#77	1,630	0	6	—	—	—	—	—	—	—
28	1985	14–12	53.8%	#81	1,713	0	6	—	—	—	—	—	—	—
29	1986	18–17	51.4%	#46	1,699	0	6	—	—	—	—	—	—	—
30	1987	13–15	46.4%	#61	1,645	0	6	—	—	—	—	—	—	—
31	1988	11–19	36.7%	#109	1,585	0	6	—	—	—	—	—	—	—
32	1989	18–15	54.5%	#45	1,662	0	6	—	—	—	—	—	—	—
33	1990	8–12	40.0%	#96	1,639	0	6	—	—	—	—	—	—	—
34	1991	0–2	0.0%	#337	1,607	0	6	—	—	—	—	—	—	—
35	1992	1–5	16.7%	#418	1,561	0	6	—	—	—	—	—	—	—
36	1993	0–4	0.0%	#394	1,510	0	6	—	—	—	—	—	—	—
37	1994	0–1	0.0%	#692	1,509	0	6	—	—	—	—	—	—	—

Surface Results by Age

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	Betsy Nagelsen																	Sandy Stap
	Yr	Hard				Clay				Grass				Carpet				Yr	Hard				Clay				Grass				Carpet
	Yr	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	Yr	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %
15	1972	—	—	—	—	2	1	3	66.7%	0	1	1	0.0%	—	—	—	—	1971	—	—	—	—	0	1	1	0.0%	0	1	1	0.0%	—	—	—	—
16	1973	1	1	2	50.0%	0	2	2	0.0%	—	—	—	—	—	—	—	—	1972	—	—	—	—	1	1	2	50.0%	1	3	4	25.0%	—	—	—	—
17	1974	3	2	5	60.0%	6	6	12	50.0%	13	6	19	68.4%	0	4	4	0.0%	1973	1	2	3	33.3%	1	3	4	25.0%	0	1	1	0.0%	—	—	—	—
18	1975	5	5	10	50.0%	6	5	11	54.5%	2	3	5	40.0%	0	1	1	0.0%	1974	—	—	—	—	4	4	8	50.0%	0	1	1	0.0%	0	1	1	0.0%
19	1976	0	2	2	0.0%	5	11	16	31.3%	3	3	6	50.0%	3	3	6	50.0%	1975	—	—	—	—	1	3	4	25.0%	5	0	5	100.0%	—	—	—	—
20	1977	3	3	6	50.0%	1	4	5	20.0%	3	5	8	37.5%	1	3	4	25.0%	1976	—	—	—	—	0	1	1	0.0%	—	—	—	—	—	—	—	—
21	1978	3	7	10	30.0%	4	6	10	40.0%	5	5	10	50.0%	1	6	7	14.3%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
22	1979	4	7	11	36.4%	0	2	2	0.0%	4	4	8	50.0%	2	6	8	25.0%	1978	—	—	—	—	0	1	1	0.0%	—	—	—	—	—	—	—	—
23	1980	7	7	14	50.0%	0	2	2	0.0%	10	7	17	58.8%	5	11	16	31.3%	1979	1	1	2	50.0%	—	—	—	—	—	—	—	—	0	2	2	0.0%
24	1981	5	6	11	45.5%	1	4	5	20.0%	11	4	15	73.3%	3	7	10	30.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
25	1982	2	4	6	33.3%	2	3	5	40.0%	3	3	6	50.0%	5	7	12	41.7%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
26	1983	2	7	9	22.2%	2	5	7	28.6%	4	5	9	44.4%	7	4	11	63.6%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
27	1984	9	7	16	56.3%	0	4	4	0.0%	2	7	9	22.2%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
28	1985	6	5	11	54.5%	0	1	1	0.0%	7	5	12	58.3%	1	1	2	50.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
29	1986	6	10	16	37.5%	0	1	1	0.0%	7	3	10	70.0%	5	3	8	62.5%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
30	1987	8	6	14	57.1%	—	—	—	—	5	5	10	50.0%	0	4	4	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
31	1988	5	13	18	27.8%	—	—	—	—	4	5	9	44.4%	2	1	3	66.7%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
32	1989	12	10	22	54.5%	—	—	—	—	6	3	9	66.7%	0	2	2	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
33	1990	3	7	10	30.0%	0	2	2	0.0%	5	3	8	62.5%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
34	1991	—	—	—	—	—	—	—	—	0	2	2	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
35	1992	0	2	2	0.0%	—	—	—	—	1	1	2	50.0%	0	2	2	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
36	1993	0	2	2	0.0%	—	—	—	—	—	—	—	—	0	2	2	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
37	1994	0	1	1	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Career	—	84	114	198	42.4%	29	59	88	33.0%	95	80	175	54.3%	35	67	102	34.3%	—	2	3	5	40.0%	7	14	21	33.3%	6	6	12	50.0%	0	3	3	0.0%

Advanced Statistics Comparison by Age

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	Betsy Nagelsen																Sandy Stap
Age	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	1972	1511	98.7	—	—	—	—	—	+28	—	53.8%	+0.23	2–1 (67%)	1–1	—	+0.77	1971	1482	103.5	—	—	—	—	—	—	—	20.0%	-0.80	0–1	—	—	+0.01
16	1973	1495	98.7	—	—	—	—	—	—	—	40.0%	-1.00	0–2	1–0	—	+0.55	1972	1493	112.1	—	—	—	—	—	—	+17	35.7%	-0.86	1–1	—	—	+0.03
17	1974	1725	133.0	—	—	—	—	-176	-202	+77	57.7%	+0.46	8–6 (57%)	5–6 (45%)	103.4	+0.58	1973	1446	101.0	—	—	—	—	+92	+47	—	27.8%	-0.89	1–1	0–1	—	+1.70
18	1975	1791	125.1	—	—	—	—	-124	-166	-38	45.7%	-0.44	4–4 (50%)	3–3 (50%)	101.5	-3.05	1974	1509	118.2	—	—	—	—	—	+31	—	53.1%	+0.56	1–3 (25%)	0–1	—	+0.89
19	1976	1709	124.2	—	—	—	—	-65	-116	+70	41.4%	-0.76	3–7 (30%)	1–1	—	-1.73	1975	1615	126.2	—	—	—	—	—	-83	-11	59.0%	+0.36	2–3 (40%)	2–1 (67%)	101.9	+0.52
20	1977	1678	123.8	—	—	—	—	-30	-105	+46	37.9%	-0.62	6–6 (50%)	1–2 (33%)	—	+0.05	1976	1595	99.7	—	—	—	—	—	—	—	33.3%	-0.33	0–1	—	—	+0.15
21	1978	1659	129.6	—	—	—	—	-99	-85	+99	40.7%	-0.58	4–10 (29%)	3–7 (30%)	92.4	-0.84	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
22	1979	1695	122.8	—	—	—	—	-132	—	+12	48.9%	+0.08	8–8 (50%)	1–3 (25%)	98.5	+1.65	1978	1580	104.8	—	—	—	—	—	—	—	46.7%	+0.20	2–1 (67%)	1–1	—	+0.18
23	1980	1753	130.7	—	—	—	—	-148	—	+40	47.9%	-0.41	7–12 (37%)	6–2 (75%)	102.2	-1.78	1979	1541	95.0	—	—	—	—	-5	—	—	33.3%	-0.89	0–1	—	—	+1.26
24	1981	1806	134.9	—	—	—	—	-129	-305	+99	49.5%	-0.18	8–7 (53%)	5–5 (50%)	103.7	-3.53	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
25	1982	1705	123.2	—	—	—	—	-99	-214	+170	47.3%	-0.34	5–11 (31%)	9–3 (75%)	100.0	-0.40	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
26	1983	1693	126.7	—	—	—	—	-32	-138	+114	46.3%	-0.46	7–8 (47%)	7–6 (54%)	102.2	+0.98	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
27	1984	1631	126.4	—	—	—	—	+59	-141	+117	41.4%	-0.51	5–7 (42%)	7–3 (70%)	99.2	+0.69	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
28	1985	1714	129.5	—	—	—	—	-26	—	+87	54.2%	+0.36	7–4 (64%)	1–2 (33%)	—	+1.17	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
29	1986	1699	131.1	—	—	—	—	-55	—	+171	51.8%	+0.01	6–7 (46%)	4–3 (57%)	98.8	+1.66	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
30	1987	1646	121.6	—	—	—	—	-24	—	+148	46.2%	0.00	5–6 (45%)	4–5 (44%)	97.1	+1.69	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
31	1988	1586	116.1	—	—	—	—	-27	—	+128	42.5%	-0.27	4–9 (31%)	5–8 (38%)	93.3	+1.55	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
32	1989	1662	126.0	—	—	—	—	-56	—	+96	50.6%	+0.04	11–6 (65%)	3–4 (43%)	105.8	+1.48	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
33	1990	1640	115.0	—	—	—	—	-81	—	+173	40.0%	-0.60	3–2 (60%)	2–4 (33%)	100.0	+0.09	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
34	1991	1608	97.2	—	—	—	—	—	—	—	20.0%	-2.40	0–1	—	—	-0.01	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
35	1992	1561	105.4	—	—	—	—	-52	—	—	26.7%	-1.67	1–2 (33%)	1–0	—	+0.03	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
36	1993	1511	98.5	—	—	—	—	-47	—	—	20.0%	-2.70	0–2	0–1	—	+0.17	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
37	1994	1509	102.5	—	—	—	—	—	—	—	0.0%	-5.50	—	—	—	-0.16	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Career	—	1891	131.9	—	—	—	—	-73	-148	+94	46.5%	-0.28	104–128 (45%)	70–69 (50%)	101.1	+0.27	—	1636	118.0	—	—	—	—	+37	+7	+1	45.9%	-0.05	7–12 (37%)	3–4 (43%)	96.0	+8.17

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.

Betsy Nagelsen's most-played WTA rivals
Opponent	W	L	M	Last Played	H2H
Pam Shriver	1	9	10	Nov 12, 1992	H2H
Sue Barker	2	8	10	Jun 28, 1981	H2H
Mary Lou Piatek	1	8	9	Sep 26, 1986	H2H
Rosie Casals	3	6	9	Aug 29, 1985	H2H
Virginia Wade	1	8	9	Jun 15, 1983	H2H

Sandy Stap's most-played WTA rivals
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