H2H data updated: 2026-09-13 00:00 UTC

Mary Lou Piatek vs Jill Hetherington H2H: 1-0

Mary Lou Piatek holds a 1–0 lead over Jill Hetherington in their WTA head-to-head. Across 1 main-draw meeting, Mary Lou Piatek leads 1–0 on hard courts. Most recently, Mary Lou Piatek won the 1989 Los Angeles round of 64 2-6 6-2 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.

Mary Lou Piatek

USA

H2H

1 – 0

1 main-draw meetings

Jill Hetherington

CAN Age 61 Right-Handed 163 cm / 5'4"

H2H Match Log

Player	Score	Player	Match Data	Date	Round	Tournament	Category	Surface
Mary Lou Piatek	2-6 6-2 6-4	Jill Hetherington #108	Match data	Aug 9, 1989*	R64	Los Angeles	WTA 500	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
Mary Lou Piatek	—	—	—	1,931	153	206	42.6%	0	0	0	0	2	2
Jill Hetherington	#748	#64	12	1,645	31	58	34.8%	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.

Mary Lou Piatek							Jill Hetherington
Yr	W-L	Win %	Rank	Elo	GS	Titles	Yr	W-L	Win %	Rank	Elo	GS	Titles
1978	0–1	0.0%	—	1,499	0	0	1983	1–1	50.0%	—	1,507	0	0
1979	3–5	37.5%	—	1,546	0	0	1984	2–2	50.0%	#121	1,543	0	0
1980	16–12	57.1%	—	1,734	0	0	1985	0–2	0.0%	#118	1,522	0	0
1981	30–22	57.7%	—	1,869	0	1	1986	1–1	50.0%	#386	1,536	0	0
1982	18–21	46.2%	—	1,791	0	1	1987	2–4	33.3%	#169	1,534	0	0
1983	12–20	37.5%	—	1,720	0	1	1988	15–19	44.1%	#81	1,573	0	1
1984	18–20	47.4%	—	1,703	0	2	1989	8–17	32.0%	#122	1,532	0	1
1985	14–18	43.8%	—	1,677	0	2	1990	1–6	14.3%	#247	1,482	0	1
1986	8–15	34.8%	—	1,618	0	2	1991	0–1	0.0%	#245	1,475	0	1
1987	6–12	33.3%	—	1,594	0	2	1992	1–3	25.0%	#277	1,458	0	1
1988	6–16	27.3%	—	1,542	0	2	1993	0–2	0.0%	#468	1,437	0	1
1989	7–15	31.8%	—	1,592	0	2	—	—	—	—	—	—	—
1990	8–11	42.1%	—	1,611	0	2	—	—	—	—	—	—	—
1991	5–8	38.5%	—	1,629	0	2	—	—	—	—	—	—	—
1992	1–8	11.1%	—	1,559	0	2	—	—	—	—	—	—	—
1993	1–2	33.3%	—	1,554	0	2	—	—	—	—	—	—	—

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.

Mary Lou Piatek																	Jill Hetherington
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 %
1978	—	—	—	—	—	—	—	—	—	—	—	—	0	1	1	0.0%	1983	1	1	2	50.0%	—	—	—	—	—	—	—	—	—	—	—	—
1979	1	1	2	50.0%	0	1	1	0.0%	—	—	—	—	2	3	5	40.0%	1984	2	2	4	50.0%	—	—	—	—	—	—	—	—	—	—	—	—
1980	5	3	8	62.5%	3	1	4	75.0%	0	2	2	0.0%	8	6	14	57.1%	1985	0	1	1	0.0%	—	—	—	—	—	—	—	—	—	—	—	—
1981	15	5	20	75.0%	6	4	10	60.0%	4	6	10	40.0%	5	7	12	41.7%	1986	1	1	2	50.0%	—	—	—	—	—	—	—	—	—	—	—	—
1982	4	5	9	44.4%	0	3	3	0.0%	1	2	3	33.3%	13	11	24	54.2%	1987	0	2	2	0.0%	2	2	4	50.0%	—	—	—	—	—	—	—	—
1983	5	6	11	45.5%	1	4	5	20.0%	0	2	2	0.0%	6	8	14	42.9%	1988	13	13	26	50.0%	0	1	1	0.0%	2	5	7	28.6%	—	—	—	—
1984	9	8	17	52.9%	0	1	1	0.0%	5	6	11	45.5%	4	5	9	44.4%	1989	6	14	20	30.0%	—	—	—	—	2	2	4	50.0%	0	1	1	0.0%
1985	7	11	18	38.9%	2	1	3	66.7%	1	2	3	33.3%	4	4	8	50.0%	1990	1	5	6	16.7%	—	—	—	—	0	1	1	0.0%	—	—	—	—
1986	5	5	10	50.0%	0	2	2	0.0%	1	2	3	33.3%	2	6	8	25.0%	1991	—	—	—	—	—	—	—	—	0	1	1	0.0%	—	—	—	—
1987	3	5	8	37.5%	0	2	2	0.0%	0	2	2	0.0%	3	3	6	50.0%	1992	0	1	1	0.0%	—	—	—	—	1	1	2	50.0%	0	1	1	0.0%
1988	4	9	13	30.8%	1	4	5	20.0%	0	1	1	0.0%	1	2	3	33.3%	1993	0	2	2	0.0%	—	—	—	—	—	—	—	—	—	—	—	—
1989	7	9	16	43.8%	0	3	3	0.0%	0	2	2	0.0%	0	1	1	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
1990	4	5	9	44.4%	3	3	6	50.0%	0	1	1	0.0%	1	2	3	33.3%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
1991	5	5	10	50.0%	0	2	2	0.0%	—	—	—	—	0	1	1	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
1992	0	6	6	0.0%	1	1	2	50.0%	0	1	1	0.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
1993	1	2	3	33.3%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Career	75	85	160	46.9%	17	32	49	34.7%	12	29	41	29.3%	49	60	109	45.0%	Career	24	42	66	36.4%	2	3	5	40.0%	5	10	15	33.3%	0	2	2	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.

Mary Lou Piatek																Jill Hetherington
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
1978	1499	106.8	—	—	—	—	—	—	—	0.0%	-3.50	—	—	—	-0.12	1983	1507	98.2	—	—	—	—	—	—	—	50.0%	-0.67	1–1	—	—	+0.39
1979	1547	118.2	—	—	—	—	+97	—	—	42.1%	-0.89	1–2 (33%)	0–1	—	+0.14	1984	1543	109.8	—	—	—	—	+46	—	—	54.5%	+0.64	1–2 (33%)	0–1	—	-0.28
1980	1735	137.7	—	—	—	—	+8	-158	—	55.7%	+0.51	3–2 (60%)	1–0	—	-0.18	1985	1523	106.3	—	—	—	—	—	—	—	20.0%	-1.20	0–1	1–2 (33%)	—	-0.21
1981	1869	146.1	—	—	—	—	+63	-192	-295	56.7%	+0.48	8–10 (44%)	6–5 (55%)	101.1	-3.04	1986	1537	105.8	—	—	—	—	—	—	—	50.0%	-1.25	—	1–0	—	+0.01
1982	1792	141.6	—	—	—	—	+56	-194	-210	47.1%	-0.08	4–5 (44%)	2–3 (40%)	96.7	-0.75	1987	1534	111.8	—	—	—	—	—	+29	—	33.3%	-0.17	2–0	0–3 (0%)	—	+0.14
1983	1721	143.7	—	—	—	—	+53	-86	—	41.3%	-0.43	4–7 (36%)	0–5 (0%)	91.3	-3.81	1988	1573	119.5	—	—	—	—	+34	—	-38	46.9%	-0.23	5–8 (38%)	4–4 (50%)	98.9	+1.57
1984	1703	128.4	—	—	—	—	-13	—	-69	47.7%	-0.47	5–5 (50%)	4–3 (57%)	101.0	-0.69	1989	1532	113.9	—	—	—	—	-43	—	+52	36.8%	-0.89	2–5 (29%)	3–3 (50%)	97.3	+0.78
1985	1678	113.6	—	—	—	—	-29	-65	-67	43.1%	-0.61	5–3 (63%)	1–3 (25%)	100.7	+2.10	1990	1482	97.6	—	—	—	—	-40	—	—	25.0%	-1.63	0–2	—	—	+0.39
1986	1618	111.0	—	—	—	—	+10	—	-24	38.5%	-0.67	2–4 (33%)	0–3 (0%)	95.5	+1.60	1991	1476	101.6	—	—	—	—	—	—	—	33.3%	-1.33	0–1	0–1	—	-0.05
1987	1594	117.2	—	—	—	—	+33	—	—	35.7%	-0.78	3–3 (50%)	0–1	—	+0.29	1992	1459	96.2	—	—	—	—	—	—	—	40.0%	-1.10	0–2	—	—	+0.64
1988	1542	116.2	—	—	—	—	+33	-43	—	30.8%	-1.31	4–4 (50%)	0–2	—	-0.55	1993	1438	95.4	—	—	—	—	—	—	—	0.0%	-3.25	—	—	—	0.00
1989	1592	121.3	—	—	—	—	+35	-116	—	31.4%	-1.65	5–2 (71%)	4–2 (67%)	107.3	-2.88	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
1990	1611	125.3	—	—	—	—	+8	-85	—	43.9%	-0.63	1–2 (33%)	0–2	—	-0.44	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
1991	1630	119.4	—	—	—	—	+17	—	—	41.4%	-0.31	1–2 (33%)	0–2	—	-0.69	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
1992	1560	101.4	—	—	—	—	-16	—	—	23.8%	-2.00	0–3 (0%)	0–2	—	-0.39	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
1993	1555	103.2	—	—	—	—	-22	—	—	42.9%	-0.71	0–1	1–0	—	-0.16	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Career	1932	136.4	—	—	—	—	+26	-124	-154	43.9%	-0.44	46–55 (46%)	19–34 (36%)	92.3	-2.67	Career	1645	115.3	—	—	—	—	-1	+29	-5	40.2%	-0.64	11–22 (33%)	9–14 (39%)	91.7	+3.80

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.

Mary Lou Piatek's most-played WTA rivals
Opponent	W	L	M	Last Played	H2H
Sylvia Hanika	5	5	10	Mar 31, 1990	H2H
Betsy Nagelsen	8	1	9	Sep 26, 1986	H2H
Anne Smith	1	7	8	Feb 14, 1991	H2H
Martina Navratilova	0	8	8	Dec 2, 1984	H2H
Wendy White	4	2	6	Feb 22, 1990	H2H

Jill Hetherington's most-played WTA rivals
Opponent	L	M	Last Played	H2H
Patty Fendick	2	2	Jun 26, 1991	H2H
Kathy Jordan	2	2	Jun 13, 1990	H2H
Helen Kelesi	2	2	Nov 9, 1989	H2H
Nana Smith	2	2	Aug 23, 1989	H2H
Pam Shriver	2	2	Jul 22, 1989	H2H