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

Justin Gimelstob

USA Age 49 196 cm / 6'5" Plays: Right-Handed ATP Tour years active: 1995–2007

Justin Gimelstob represented the United States on the ATP Tour and reached a career-high ranking of No. 63. In TennisDB's records, Justin Gimelstob finished with a career record of 107–171 and no singles titles.

Peak ranking

63 (Apr 19, 1999)

Elo peak

1722 (57th percentile)

Career record

107–171 (38.5%)

Career titles

Prize money

$2,575,522

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 →

Justin Gimelstob's recent, live, and scheduled ATP matches
Opponent	Score	Result	H2H	Match Data	Date	Round	Tournament	Category	Surface
Mikhail Youzhny #19	2-6 4-6	L	H2H	Match data	Oct 25, 2007*	R32	St. Petersburg	ATP 250	Carpet
Philipp Kohlschreiber #33	1-6 3-6	L	H2H	Match data	Oct 11, 2007*	R32	Moscow	ATP 250	Hard
Thomas Johansson #55	4-6 4-6	L	H2H	Match data	Oct 4, 2007*	R32	Japan Open	ATP 500	Hard
Lukasz Kubot #181	6-4 7-5	W	H2H	Match data	Oct 3, 2007*	R64	Japan Open	ATP 500	Hard
Andy Roddick #5	6-7(6) 3-6 3-6	L	H2H	Match data	Aug 29, 2007*	R128	US Open	Grand Slam	Hard

Rivals all rivalries →

Justin Gimelstob's most-played ATP rivals
Opponent	W	L	M	Last Played	H2H
Jan-Michael Gambill	4	4	8	Jan 6, 2005	H2H
Vincent Spadea	2	4	6	Jul 12, 2007	H2H
Wayne Ferreira	0	5	5	Jun 22, 2000	H2H
Jonas Bjorkman	2	2	4	Jun 13, 2007	H2H
Mark Philippoussis	1	3	4	Jul 16, 2006	H2H

Career Results

Justin Gimelstob career results by season
Season	Age	Type	W	L	M	Win %	Start Rank	End Rank
1995	18	ATP	1	1	2	50.0%	—	—
1996	19	ATP	3	9	12	25.0%	576	152
1997	20	ATP	17	23	40	42.5%	152	104
1998	21	ATP	14	15	29	48.3%	104	80
1999	22	ATP	17	26	43	39.5%	80	82
2000	23	ATP	14	16	30	46.7%	82	97
2001	24	Qualifying Q	3	0	3	100.0%	—	—
2001	24	ATP	3	12	15	20.0%	97	177
2002	25	Qualifying Q	3	2	5	60.0%	—	—
2002	25	ATP	5	6	11	45.5%	179	106
2003	26	ATP	9	17	26	34.6%	107	106
2004	27	Qualifying Q	2	2	4	50.0%	—	—
2004	27	ATP	1	5	6	16.7%	106	162
2005	28	Qualifying Q	2	1	3	66.7%	—	—
2005	28	ATP	8	9	17	47.1%	162	104
2006	29	ATP	14	20	34	41.2%	104	86
2007	30	Qualifying Q	3	0	3	100.0%	—	—
2007	30	ATP	1	12	13	7.7%	86	556
Career		—	107	171	278	38.5%	—	—

Career Results by Surface

Justin Gimelstob career results by season and surface
Season	Age	Type	Hard				Clay				Grass				Carpet				Total
Season	Age	Type	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %
1995	18	ATP	1	1	2	50.0%	—	—	—	—	—	—	—	—	—	—	—	—	1	1	2	50.0%
1996	19	ATP	3	7	10	30.0%	—	—	—	—	0	2	2	0.0%	—	—	—	—	3	9	12	25.0%
1997	20	ATP	15	16	31	48.4%	—	—	—	—	1	4	5	20.0%	1	3	4	25.0%	17	23	40	42.5%
1998	21	ATP	5	7	12	41.7%	4	2	6	66.7%	3	4	7	42.9%	2	2	4	50.0%	14	15	29	48.3%
1999	22	ATP	13	16	29	44.8%	2	5	7	28.6%	1	4	5	20.0%	1	1	2	50.0%	17	26	43	39.5%
2000	23	ATP	10	9	19	52.6%	0	3	3	0.0%	4	4	8	50.0%	—	—	—	—	14	16	30	46.7%
2001	24	Qualifying Q	3	0	3	100.0%	—	—	—	—	—	—	—	—	—	—	—	—	3	0	3	100.0%
2001	24	ATP	2	10	12	16.7%	—	—	—	—	1	2	3	33.3%	—	—	—	—	3	12	15	20.0%
2002	25	Qualifying Q	1	1	2	50.0%	—	—	—	—	2	1	3	66.7%	—	—	—	—	3	2	5	60.0%
2002	25	ATP	3	5	8	37.5%	—	—	—	—	2	1	3	66.7%	—	—	—	—	5	6	11	45.5%
2003	26	ATP	5	11	16	31.3%	0	2	2	0.0%	4	4	8	50.0%	—	—	—	—	9	17	26	34.6%
2004	27	Qualifying Q	0	1	1	0.0%	—	—	—	—	2	1	3	66.7%	—	—	—	—	2	2	4	50.0%
2004	27	ATP	1	4	5	20.0%	—	—	—	—	0	1	1	0.0%	—	—	—	—	1	5	6	16.7%
2005	28	Qualifying Q	—	—	—	—	—	—	—	—	2	1	3	66.7%	—	—	—	—	2	1	3	66.7%
2005	28	ATP	6	8	14	42.9%	—	—	—	—	2	1	3	66.7%	—	—	—	—	8	9	17	47.1%
2006	29	ATP	6	13	19	31.6%	2	3	5	40.0%	6	4	10	60.0%	—	—	—	—	14	20	34	41.2%
2007	30	Qualifying Q	—	—	—	—	—	—	—	—	3	0	3	100.0%	—	—	—	—	3	0	3	100.0%
2007	30	ATP	1	5	6	16.7%	0	2	2	0.0%	0	4	4	0.0%	0	1	1	0.0%	1	12	13	7.7%
Career	—	—	71	112	183	38.8%	8	17	25	32.0%	24	35	59	40.7%	4	7	11	36.4%	107	171	278	38.5%

Career Results by Opponent Rank

Justin Gimelstob 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 %
1995	18	0	0	—	—	0	1	1	0.0%	1	0	1	100.0%	0	0	—	—	1	1	2	50.0%
1996	19	0	1	1	0.0%	0	0	—	—	2	5	7	28.6%	1	2	3	33.3%	3	8	11	27.3%
1997	20	0	3	3	0.0%	2	2	4	50.0%	6	10	16	37.5%	7	7	14	50.0%	15	22	37	40.5%
1998	21	2	0	2	100.0%	0	3	3	0.0%	8	8	16	50.0%	3	4	7	42.9%	13	15	28	46.4%
1999	22	1	2	3	33.3%	1	5	6	16.7%	9	12	21	42.9%	6	6	12	50.0%	17	25	42	40.5%
2000	23	0	4	4	0.0%	3	2	5	60.0%	5	4	9	55.6%	6	6	12	50.0%	14	16	30	46.7%
2001	24	0	0	—	—	0	3	3	0.0%	1	3	4	25.0%	2	6	8	25.0%	3	12	15	20.0%
2002	25	0	3	3	0.0%	0	0	—	—	0	3	3	0.0%	5	0	5	100.0%	5	6	11	45.5%
2003	26	0	0	—	—	2	1	3	66.7%	1	11	12	8.3%	5	4	9	55.6%	8	16	24	33.3%
2004	27	0	0	—	—	0	1	1	0.0%	0	3	3	0.0%	1	1	2	50.0%	1	5	6	16.7%
2005	28	0	4	4	0.0%	1	1	2	50.0%	4	3	7	57.1%	3	1	4	75.0%	8	9	17	47.1%
2006	29	0	3	3	0.0%	0	3	3	0.0%	8	10	18	44.4%	6	3	9	66.7%	14	19	33	42.4%
2007	30	0	2	2	0.0%	0	2	2	0.0%	0	7	7	0.0%	1	1	2	50.0%	1	12	13	7.7%
Career		3	22	25	12.0%	9	24	33	27.3%	45	79	124	36.3%	46	41	87	52.9%	103	166	269	38.3%

Opponent ranking data available for 269/278 (96.8%) of Justin Gimelstob's ATP main draw matches.

Performance Stats

Justin Gimelstob performance statistics by season
Season	Age	Sample	Aces/M	DFs/M	1st Sv%	1st Sv Pts%	2nd Sv Pts%	BP Saved%	BP Conv%	Svc Pts%	Ret Pts%
1995	18	2/2	8.0	5.0	62.7%	69.5%	44.6%	68.1%	31.7%	59.4%	30.5%
1996	19	10/12	5.1	3.4	54.9%	73.3%	46.5%	41.8%	50.8%	61.4%	35.3%
1997	20	36/40	6.0	5.8	58.7%	71.8%	44.8%	51.3%	37.8%	60.5%	35.9%
1998	21	26/29	5.5	3.9	59.7%	72.6%	47.9%	55.6%	44.3%	62.5%	39.5%
1999	22	37/43	6.9	3.9	60.4%	72.2%	47.6%	56.4%	39.5%	62.4%	35.7%
2000	23	29/30	8.3	4.4	58.7%	73.7%	49.6%	57.8%	36.8%	63.2%	37.6%
2001	24	13/15	5.6	5.7	55.5%	71.2%	45.9%	45.8%	36.3%	59.8%	34.1%
2002	25	10/11	5.5	5.7	53.9%	69.8%	43.4%	49.0%	29.6%	57.9%	37.0%
2003	26	26/26	7.3	4.2	54.5%	73.8%	45.2%	63.5%	42.7%	60.7%	36.5%
2004	27	6/6	4.5	5.5	48.7%	73.2%	49.4%	40.7%	26.3%	60.7%	35.9%
2005	28	17/17	11.4	4.9	56.8%	77.1%	52.2%	59.4%	40.1%	66.2%	35.8%
2006	29	34/34	7.0	2.9	56.6%	72.4%	47.8%	63.7%	36.2%	61.7%	34.9%
2007	30	13/13	4.3	4.8	57.1%	65.3%	43.1%	49.5%	26.4%	55.8%	29.5%
Career		259/278	6.8	4.4	57.4%	72.4%	47.1%	55.6%	38.2%	61.5%	35.9%

Detailed serve and return statistics available for 259/278 (93.2%) of Justin Gimelstob's ATP main draw matches.

Advanced Stats

Justin Gimelstob 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
1995	18	1530	110.0	-1.36	+1.92	0.750	45.8%	—	—	—	37.5%	-0.63	1–0	—	—	-0.13
1996	19	1510	118.9	+0.13	+0.36	0.915	48.2%	+28	—	—	29.6%	-0.93	1–2 (33%)	1–4 (20%)	97.5	-0.63
1997	20	1630	134.5	-1.35	-0.78	0.909	48.5%	+30	—	-55	43.3%	-0.47	7–6 (54%)	10–8 (56%)	103.8	+0.60
1998	21	1661	129.0	+0.39	+1.22	1.052	50.8%	-10	-75	-71	50.7%	+0.12	6–8 (43%)	4–9 (31%)	96.0	-0.12
1999	22	1645	137.7	-0.21	-1.19	0.949	49.1%	+36	-75	-122	45.0%	-0.28	3–10 (23%)	7–12 (37%)	91.8	-1.22
2000	23	1675	126.8	+0.05	+0.25	1.022	50.4%	+34	-174	-115	47.5%	-0.40	5–7 (42%)	10–6 (63%)	99.6	+0.17
2001	24	1596	108.5	-1.35	-2.71	0.849	47.0%	+17	—	-76	29.3%	-1.39	2–4 (33%)	3–4 (43%)	96.1	+0.32
2002	25	1620	119.3	-1.95	+1.16	0.880	46.9%	+9	—	-59	40.7%	-0.81	2–0	1–2 (33%)	—	-0.03
2003	26	1532	117.2	-2.07	-0.87	0.929	48.9%	+13	—	+76	40.0%	-0.51	3–5 (38%)	3–7 (30%)	95.7	+1.70
2004	27	1507	110.1	-0.55	-0.52	0.913	47.3%	+4	—	—	23.1%	-1.69	0–3 (0%)	—	—	-0.42
2005	28	1596	127.5	+2.04	+0.31	1.059	51.1%	-56	—	+71	48.9%	+0.08	2–5 (29%)	6–7 (46%)	99.7	-0.05
2006	29	1606	122.4	-0.69	-1.72	0.913	49.0%	-77	-132	+106	44.9%	-0.32	3–5 (38%)	6–7 (46%)	100.7	+0.54
2007	30	1537	116.4	-4.94	-3.75	0.668	43.5%	-37	—	+128	10.0%	-2.37	0–1	0–2	—	-0.45
Career		1722	132.5	-0.75	-0.68	0.933	48.8%	+5	-103	-6	41.7%	-0.51	35–56 (38%)	51–68 (43%)	92.8	+0.10

Tournament Results by Category

Grand Slams

Justin Gimelstob Grand Slams results by season
Season	Age	AO	RG	W	USO	W-L Win %
1995	18	—	—	—	R64	1–1 (50%)
1997	20	R128	—	R64	R32	3–3 (50%)
1998	21	R128	—	R64	R128	1–3 (25%)
1999	22	R64	R128	R128	R32	3–4 (43%)
2000	23	—	R128	R32	R64	3–3 (50%)
2001	24	R128	—	—	R64	4–2 (67%)
2002	25	Q2	—	Q3	R64	4–3 (57%)
2003	26	R128	R128	R32	R128	2–4 (33%)
2004	27	—	—	Q3	Q1	2–2 (50%)
2005	28	R128	—	R32	R128	4–4 (50%)
2006	29	R128	R128	R64	R64	2–4 (33%)
2007	30	—	R128	R128	R128	0–3 (0%)
W-L		2–8 (20%)	0–5 (0%)	15–11 (58%)	12–12 (50%)	29–36 (45%)

Masters 1000

Justin Gimelstob Masters 1000 results by season
Season	Age	CAN	CIN	IW	MIA	STU	W-L Win %
1996	19	—	—	—	R128	—	0–1 (0%)
1997	20	R16	R32	R64	R128	—	3–4 (43%)
1998	21	—	R64	—	—	—	0–1 (0%)
1999	22	R64	R16	R32	R128	R64	3–5 (38%)
2000	23	—	—	R64	R128	—	0–2 (0%)
2001	24	—	—	—	R128	—	0–1 (0%)
2006	29	—	R32	R64	R128	—	2–3 (40%)
2007	30	—	—	R128	—	—	0–1 (0%)
W-L		2–2 (50%)	4–4 (50%)	2–5 (29%)	0–6 (0%)	0–1 (0%)	8–18 (31%)

ATP 500

Justin Gimelstob ATP 500 results by season
Season	Age	BAR	NAP	TKY	WAS	MEM	NEW	PHI	BRI	W-L Win %
1996	19	—	R64	—	R64	—	—	—	—	0–2 (0%)
1997	20	—	R64	R32	R64	R32	—	R16	R32	3–6 (33%)
1998	21	—	—	—	R16	—	R64	—	R16	3–3 (50%)
1999	22	—	—	—	R16	R64	—	—	R32	2–3 (40%)
2000	23	—	—	—	—	R64	—	—	—	0–1 (0%)
2001	24	—	—	—	R64	R64	—	—	—	0–2 (0%)
2002	25	—	—	—	R32	R16	—	—	—	2–2 (50%)
2003	26	—	—	R64	—	R32	—	—	—	0–2 (0%)
2004	27	—	—	R32	—	—	—	—	—	1–1 (50%)
2005	28	—	—	R64	—	—	—	—	—	0–1 (0%)
2006	29	R64	—	—	—	R32	—	—	—	0–2 (0%)
2007	30	—	—	R32	—	—	—	—	—	1–1 (50%)
W-L		0–1 (0%)	0–2 (0%)	3–5 (38%)	5–6 (45%)	2–7 (22%)	0–1 (0%)	1–1 (50%)	1–3 (25%)	12–26 (32%)

ATP 250

Justin Gimelstob ATP 250 results by season
Season	Age	ADE	ATL	BEI	CHN	DLB	EAS	EST	HAL	HKG	MRS	NAP	NWP	QUE	SHA	SPB	WAS	BAN	COP	DLB	QUE	LON	LOS	MOS	NEW	EAS	ORL	SAN	SCO	ST.	TAS	TEL	TOU	U.S	W-L Win %
1996	19	—	—	—	—	—	—	—	—	—	—	—	R32	R64	—	—	—	—	—	—	—	—	R32	—	—	—	—	R16	QF	—	—	R32	—	—	3–6 (33%)
1997	20	—	—	R16	—	—	—	—	—	QF	—	—	R32	R64	R16	—	—	—	—	—	—	—	R16	R32	—	R32	—	R16	—	—	—	—	QF	—	8–10 (44%)
1998	21	—	—	—	—	—	—	—	—	—	—	—	QF	R64	R16	—	—	—	—	SF	—	—	SF	—	—	R32	R16	R32	—	—	—	—	—	—	10–8 (56%)
1999	22	R32	R16	—	—	R16	—	—	R16	—	R32	—	R32	—	R32	—	—	—	—	—	—	—	R16	R16	—	R32	R32	QF	QF	R32	—	—	—	—	9–14 (39%)
2000	23	—	R32	—	—	QF	—	—	—	—	—	—	R32	R16	—	—	—	—	—	—	—	R64	SF	—	—	R32	R32	QF	—	—	QF	—	—	—	11–10 (52%)
2001	24	R32	—	—	—	—	—	—	—	—	R32	—	R32	R32	R16	—	—	—	—	—	—	—	R32	—	—	—	—	R32	—	—	—	—	—	—	2–7 (22%)
2002	25	—	—	—	—	—	—	—	—	—	—	—	QF	—	—	—	—	—	—	—	—	—	R32	—	—	—	—	R32	—	—	—	—	—	—	2–3 (40%)
2003	26	—	—	—	R32	R16	—	—	—	—	—	R32	QF	R64	R16	—	—	—	R32	—	—	—	R32	—	—	R32	—	SF	—	—	—	—	—	R32	7–11 (39%)
2004	27	—	—	R32	—	—	—	—	—	—	—	—	R32	—	—	—	R32	R32	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0–4 (0%)
2005	28	—	—	R16	QF	—	—	—	—	—	—	—	—	—	—	—	—	R16	—	—	—	—	—	—	R32	—	—	—	R16	—	—	—	—	—	6–5 (55%)
2006	29	—	—	—	R16	R16	—	QF	—	—	—	R64	F	R32	—	—	R64	—	—	—	—	—	R32	—	R64	R32	—	R16	—	—	—	—	—	—	10–11 (48%)
2007	30	—	—	—	—	—	R32	—	—	—	—	R32	R32	—	—	R32	—	—	—	—	R64	—	—	R32	—	—	—	—	—	—	—	—	—	R32	3–7 (30%)
W-L		0–2 (0%)	1–2 (33%)	2–3 (40%)	3–3 (50%)	5–4 (56%)	3–1 (75%)	2–1 (67%)	1–1 (50%)	2–1 (67%)	0–2 (0%)	0–3 (0%)	10–11 (48%)	4–7 (36%)	4–5 (44%)	0–1 (0%)	0–2 (0%)	1–2 (33%)	0–1 (0%)	3–1 (75%)	0–1 (0%)	0–1 (0%)	8–9 (47%)	1–3 (25%)	1–2 (33%)	0–6 (0%)	1–3 (25%)	10–9 (53%)	5–3 (62%)	0–1 (0%)	2–1 (67%)	0–1 (0%)	2–1 (67%)	0–2 (0%)	71–96 (43%)

Results show the best round reached per tournament and season.

ATP Ranking History full ranking history →

Career high

Career-high date

Apr 19, 1999

First Top 100

Jul 28, 1997

First Top 50

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First Top 20

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First Top 10

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Ranking History Matrix

Justin Gimelstob ranking history by month and season
Season	Age	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1996	19	575	429	294	297	298	299	293	288	238	230	155	152
1997	20	139	130	141	121	121	117	100	89	81	84	101	104
1998	21	106	116	122	125	114	113	98	89	114	103	80	80
1999	22	80	70	66	63	70	66	85	87	84	82	81	82
2000	23	96	96	99	91	99	99	82	88	85	86	98	97
2001	24	94	101	118	118	114	112	155	174	183	181	179	177
2002	25	181	160	159	150	152	155	133	130	130	104	104	106
2003	26	106	90	87	97	90	96	81	82	93	105	104	106
2004	27	109	137	151	163	176	157	247	254	224	225	159	162
2005	28	143	140	130	117	111	123	95	96	108	95	117	104
2006	29	110	92	94	99	92	95	83	73	71	74	82	86
2007	30	88	106	116	127	150	155	313	475	677	544	554	556
2008	31	554	562	600	595	611	700	762	763	841	—	—	—

Similar Players

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

Justin Gimelstob's most statistically similar ATP players
Player	Country	Peak Rank	Peak Elo	Titles	M	W	L	Win %	Years	Match Log
Paul Goldstein	USA	58	1,747	0	200	85	115	42.5%	1993–2007	Match log
Markus Hipfl	AUT	63	1,686	0	133	55	78	41.4%	1994–2005	Match log
Lars Burgsmuller	GER	65	1,747	1	236	87	149	36.9%	1994–2007	Match log
Attila Savolt	HUN	68	1,650	0	78	30	48	38.5%	1998–2004	Match log
Kevin Kim	USA	63	1,642	0	141	44	97	31.2%	1996–2010	Match log
Brian Vahaly	USA	64	1,641	0	64	21	43	32.8%	2002–2006	Match log
Kristian Pless	DEN	65	1,712	0	126	44	82	34.9%	1999–2008	Match log
Markus Hantschk	GER	71	1,608	0	67	26	41	38.8%	1998–2004	Match log
Andrei Stoliarov	RUS	71	1,646	0	93	35	58	37.6%	1997–2004	Match log
Oliver Gross	GER	60	1,702	0	128	49	79	38.3%	1993–2003	Match log
Antony Dupuis	FRA	57	1,686	1	214	86	128	40.2%	1996–2007	Match log
Olivier Mutis	FRA	71	1,628	0	65	24	41	36.9%	1995–2005	Match log

Frequently Asked Questions

How old is Justin Gimelstob?: Justin Gimelstob is 49 years old, born on January 26, 1977.
Which country does Justin Gimelstob represent?: Justin Gimelstob represents United States in TennisDB's ATP records.
How tall is Justin Gimelstob?: Justin Gimelstob is 196 cm / 6'5".
Is Justin Gimelstob left-handed or right-handed?: Justin Gimelstob plays right-handed.
How many Grand Slams has Justin Gimelstob won?: Justin Gimelstob has not won a Grand Slam title.
How many Masters 1000 titles has Justin Gimelstob won?: TennisDB does not group any of Justin Gimelstob's titles under the modern Masters 1000 category.
What is Justin Gimelstob's highest ATP ranking?: Justin Gimelstob's career-high ATP singles ranking is world No. 63, first achieved on April 19, 1999.
What is Justin Gimelstob's career win-loss record?: Justin Gimelstob has a career ATP singles record of 107 wins and 171 losses (38.5%).
How much career prize money has Justin Gimelstob earned?: Justin Gimelstob has earned at least $2,575,522 in career prize money from professional tennis.
What turned-professional year does TennisDB record for Justin Gimelstob?: TennisDB records 1996 as Justin Gimelstob's turned-professional year.
Which seasons of Justin Gimelstob's career appear in TennisDB?: Justin Gimelstob appears in TennisDB's ATP main-tour match records from 1995 through 2007.
On which surface does Justin Gimelstob have the highest recorded win rate?: Among surfaces with at least 20 recorded matches, Justin Gimelstob's highest ATP main-draw win rate is on grass: 40.7% (24–35).
Who has Justin Gimelstob faced most often?: Justin Gimelstob's most frequent opponent is Jan-Michael Gambill, with a head-to-head record of 4–4 across 8 meetings.