The Boston Celtics have a 21-21 record versus the Heat in the playoffs all-time.

TEAM	DATE	REC	TM		OPP	RESULT	W%	MIN	PTS	REB	AST	STL	BLK	TOV	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	PF
Boston Celtics	4/17/2010	1-0	BOS	vs	MIA	W 85-76	1.000	240	85	37	18	11	6	14	31	70	44.3	1	6	16.7	22	28	78.6	11
Boston Celtics	4/20/2010	1-0	BOS	vs	MIA	W 106-77	1.000	240	106	50	26	7	4	13	36	75	48.0	12	20	60.0	22	27	81.5	14
Boston Celtics	4/23/2010	1-0	BOS	@	MIA	W 100-98	1.000	240	100	38	19	9	2	14	37	79	46.8	8	23	34.8	18	23	78.3	23
Boston Celtics	4/25/2010	0-1	BOS	@	MIA	L 92-101	.000	240	92	35	19	10	4	16	34	69	49.3	8	21	38.1	16	27	59.3	22
Boston Celtics	4/27/2010	1-0	BOS	vs	MIA	W 96-86	1.000	240	96	38	28	11	6	16	35	72	48.6	7	12	58.3	19	22	86.4	24
Boston Celtics	5/1/2011	0-1	BOS	@	MIA	L 90-99	.000	240	90	39	18	7	3	13	32	75	42.7	12	24	50.0	14	18	77.8	24
Boston Celtics	5/3/2011	0-1	BOS	@	MIA	L 91-102	.000	240	91	38	18	7	2	11	34	79	43.0	6	11	54.5	17	22	77.3	24
Boston Celtics	5/7/2011	1-0	BOS	vs	MIA	W 97-81	1.000	240	97	39	27	7	4	12	37	74	50.0	9	18	50.0	14	17	82.4	17
Boston Celtics	5/9/2011	0-1	BOS	vs	MIA	L 90-98	.000	265	90	28	15	9	4	16	30	70	42.9	5	16	31.3	25	29	86.2	23
Boston Celtics	5/11/2011	0-1	BOS	@	MIA	L 87-97	.000	240	87	30	15	5	5	17	33	67	49.3	7	15	46.7	14	20	70.0	25
Boston Celtics	5/28/2012	0-1	BOS	@	MIA	L 79-93	.000	240	79	33	19	6	1	8	32	81	39.5	4	14	28.6	11	21	52.4	19
Boston Celtics	5/30/2012	0-1	BOS	@	MIA	L 111-115	.000	265	111	42	15	5	2	8	40	81	49.4	5	16	31.3	26	29	89.7	33
Boston Celtics	6/1/2012	1-0	BOS	vs	MIA	W 101-91	1.000	240	101	44	16	4	4	12	38	76	50.0	5	17	29.4	20	26	76.9	24
Boston Celtics	6/3/2012	1-0	BOS	vs	MIA	W 93-91	1.000	265	93	39	22	6	7	15	35	85	41.2	9	27	33.3	14	20	70.0	30
Boston Celtics	6/5/2012	1-0	BOS	@	MIA	W 94-90	1.000	240	94	39	19	13	4	12	33	81	40.7	6	15	40.0	22	27	81.5	21
Boston Celtics	6/7/2012	0-1	BOS	vs	MIA	L 79-98	.000	240	79	34	14	9	3	13	32	75	42.7	1	14	7.1	14	20	70.0	19
Boston Celtics	6/9/2012	0-1	BOS	@	MIA	L 88-101	.000	240	88	33	19	10	2	13	35	75	46.7	6	19	31.6	12	15	80.0	24
Boston Celtics	9/15/2020	0-1	BOS	vs	MIA	L 114-117	.000	265	114	37	24	9	6	10	39	88	44.3	15	42	35.7	21	23	91.3	25
Boston Celtics	9/17/2020	0-1	BOS	vs	MIA	L 101-106	.000	240	101	41	19	5	3	20	36	72	50.0	10	28	35.7	19	24	79.2	22
Boston Celtics	9/19/2020	1-0	BOS	@	MIA	W 117-106	1.000	240	117	50	27	8	3	14	41	85	48.2	9	26	34.6	26	30	86.7	29
Boston Celtics	9/23/2020	0-1	BOS	@	MIA	L 109-112	.000	240	109	46	28	3	5	19	39	82	47.6	14	40	35.0	17	21	81.0	24
Boston Celtics	9/25/2020	1-0	BOS	vs	MIA	W 121-108	1.000	240	121	50	29	7	4	11	42	93	45.2	12	38	31.6	25	29	86.2	23
Boston Celtics	9/27/2020	0-1	BOS	@	MIA	L 113-125	.000	240	113	42	26	7	2	10	43	99	43.4	15	46	32.6	12	15	80.0	21
Boston Celtics	5/17/2022	0-1	BOS	@	MIA	L 107-118	.000	240	107	38	22	8	8	16	36	79	45.6	11	34	32.4	24	32	75.0	23
Boston Celtics	5/19/2022	1-0	BOS	@	MIA	W 127-102	1.000	240	127	41	28	8	5	9	43	84	51.2	20	40	50.0	21	23	91.3	21