The Milwaukee Bucks had the lowest defensive rating by a team in the 2021 playoffs, with a 107.6 rating.

2021 playoffs best team defensive rating

TEAM	DRTG	SEASON	GP	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF
Milwaukee Bucks	107.6	2020-21	23	242.2	110.3	49.0	22.8	7.8	4.2	12.7	42.1	91.1	46.2	11.2	35.0	32.1	14.9	20.8	71.8	5,570	2,537	1,126	525	180	97	293	413
Philadelphia 76ers	108.5	2020-21	12	240.0	116.3	44.7	24.9	8.0	6.2	12.8	42.5	85.8	49.6	11.2	28.4	39.3	20.1	29.3	68.5	2,880	1,395	536	299	96	74	154	276
Brooklyn Nets	109.6	2020-21	12	242.1	112.5	42.6	22.6	7.1	4.8	11.6	40.7	86.2	47.2	13.6	35.6	38.2	17.6	20.3	86.8	2,905	1,350	511	271	85	58	139	254
Phoenix Suns	110.0	2020-21	22	240.0	109.0	42.7	23.2	6.5	4.2	11.9	40.9	85.0	48.1	11.2	29.7	37.6	16.0	18.6	86.1	5,280	2,398	939	511	142	92	262	434
Los Angeles Lakers	110.9	2020-21	6	240.0	97.5	43.2	19.3	6.7	4.0	13.8	34.3	83.0	41.4	9.8	32.8	29.9	19.0	24.5	77.6	1,440	585	259	116	40	24	83	123
New York Knicks	111.0	2020-21	5	240.0	97.0	46.4	18.6	5.8	2.8	12.2	34.4	86.4	39.8	10.4	30.4	34.2	17.8	21.8	81.7	1,200	485	232	93	29	14	61	99
Atlanta Hawks	111.3	2020-21	18	240.0	106.3	42.4	20.2	6.7	4.4	12.4	38.9	86.8	44.9	11.7	34.2	34.3	16.7	20.9	79.8	4,320	1,913	763	364	121	79	224	382
L.A. Clippers	115.9	2020-21	19	240.0	111.6	41.2	20.8	6.8	4.3	10.7	39.1	81.9	47.7	13.8	36.4	38.1	19.5	23.7	82.3	4,560	2,120	782	395	129	81	203	370
Miami Heat	116.8	2020-21	4	246.3	98.0	42.3	21.5	7.3	3.5	14.0	35.3	89.3	39.5	12.0	35.8	33.6	15.5	20.3	76.5	985	392	169	86	29	14	56	82
Dallas Mavericks	121.1	2020-21	7	240.0	106.0	40.6	20.7	5.6	2.1	11.0	39.1	86.0	45.5	13.6	35.0	38.8	14.1	20.0	70.7	1,680	742	284	145	39	15	77	142
Washington Wizards	121.3	2020-21	5	240.0	110.0	43.4	22.4	4.8	4.8	13.4	40.6	88.6	45.8	7.0	24.2	28.9	21.8	29.0	75.2	1,200	550	217	112	24	24	67	120
Utah Jazz	122.3	2020-21	11	240.0	116.9	42.4	19.6	5.2	4.1	13.5	39.7	84.2	47.2	18.0	43.6	41.3	19.5	24.3	80.1	2,640	1,286	466	216	57	45	148	237
Denver Nuggets	122.4	2020-21	10	245.0	114.8	43.6	24.9	6.1	4.3	11.2	42.1	92.2	45.7	14.7	38.5	38.2	15.9	20.9	76.1	2,450	1,148	436	249	61	43	112	204
Portland Trail Blazers	122.9	2020-21	6	248.3	119.5	41.7	22.8	5.2	5.5	11.8	42.0	88.3	47.5	16.2	39.2	41.3	19.3	22.7	85.3	1,490	717	250	137	31	33	71	139
Memphis Grizzlies	124.0	2020-21	5	240.0	115.0	41.2	22.0	8.0	4.0	10.4	44.2	94.4	46.8	10.4	31.6	32.9	16.2	20.4	79.4	1,200	575	206	110	40	20	52	103
Boston Celtics	128.7	2020-21	5	240.0	112.2	41.4	21.0	6.4	7.0	13.0	38.4	88.2	43.5	12.8	36.6	35.0	22.6	27.4	82.5	1,200	561	207	105	32	35	65	105