Alize Johnson had the best defensive rating in the 2021 playoffs, with an 89.8 rating.

Interpreted as:

best def rating by a player playoffs 2021

	NAME	DRTG	SEASON	TM	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Alize Johnson A. Johnson	89.8	2020-21	BKN	5	4.6	1.6	2.6	0.0	0.6	0.0	0.8	1.4	57.1	0.0	0.0		0.0	0.0		57.1	0.6	2.0	0.6	23	8	13	0	3	0	3	1	+12
2	Kevin Knox II K. Knox II	94.0	2020-21	NYK	1	4.0	2.0	1.0	1.0	0.0	1.0	0.0	0.0		0.0	0.0		2.0	2.0	100.0	113.6	0.0	1.0	0.0	4	2	1	1	0	1	0	0	+9
3	Thanasis Antetokounmpo T. Antetokounmpo	96.5	2020-21	MIL	13	3.5	0.7	0.8	0.2	0.4	0.2	0.2	0.5	28.6	0.0	0.0		0.4	0.5	83.3	46.7	0.2	0.5	0.2	45	9	10	3	5	2	3	12	-13
4	Sam Merrill S. Merrill	98.0	2020-21	MIL	8	3.8	0.6	0.6	0.1	0.5	0.0	0.3	0.9	28.6	0.1	0.6	20.0	0.0	0.0		35.7	0.1	0.5	0.1	30	5	5	1	4	0	1	2	-8
5	Nathan Knight N. Knight	98.2	2020-21	ATL	6	2.3	0.7	1.0	0.0	0.0	0.3	0.3	1.2	28.6	0.0	0.3	0.0	0.0	0.3	0.0	25.4	0.0	1.0	0.0	14	4	6	0	0	2	0	2	-7
6	Precious Achiuwa P. Achiuwa	99.1	2020-21	MIA	3	4.0	2.3	2.0	0.0	0.0	0.7	1.0	1.3	75.0	0.0	0.0		0.3	1.3	25.0	60.8	0.0	2.0	1.3	12	7	6	0	0	2	4	1	0
7	Mamadi Diakite M. Diakite	100.2	2020-21	MIL	7	5.0	1.0	1.0	0.0	0.4	0.1	0.3	1.4	20.0	0.1	0.3	50.0	0.3	0.3	100.0	32.2	0.1	0.9	0.1	35	7	7	0	3	1	1	7	-2
8	Paul Reed P. Reed	100.4	2020-21	PHI	3	3.7	1.3	2.7	0.0	0.0	0.3	0.7	1.3	50.0	0.0	0.0		0.0	0.0		50.0	1.0	1.7	0.0	11	4	8	0	0	1	0	1	0
9	Serge Ibaka S. Ibaka	101.8	2020-21	LAC	2	9.0	5.0	2.0	1.0	0.5	1.5	1.5	3.0	50.0	0.0	1.0	0.0	2.0	2.0	100.0	64.4	0.5	1.5	0.5	18	10	4	2	1	3	1	1	+17
10	Udoka Azubuike U. Azubuike	102.1	2020-21	UTA	1	1.0	0.0	1.0	0.0	0.0	0.0	0.0	0.0		0.0	0.0		0.0	0.0			0.0	1.0	0.0	1	0	1	0	0	0	0	0	+1
11	John Konchar J. Konchar	102.8	2020-21	MEM	1	3.0	0.0	1.0	0.0	0.0	1.0	0.0	1.0	0.0	0.0	1.0	0.0	0.0	0.0		0.0	0.0	1.0	0.0	3	0	1	0	0	1	0	0	+4
12	Skylar Mays S. Mays	103.5	2020-21	ATL	7	2.4	1.1	0.3	0.1	0.3	0.0	0.6	0.7	80.0	0.0	0.0		0.0	0.0		80.0	0.0	0.3	0.1	17	8	2	1	2	0	1	1	0
13	Andre Drummond A. Drummond	103.9	2020-21	LAL	5	21.0	9.0	11.0	0.0	0.8	0.6	3.8	6.4	59.4	0.0	0.0		1.4	2.0	70.0	61.8	3.8	7.2	2.2	105	45	55	0	4	3	11	12	-4
14	Joel Embiid J. Embiid	104.5	2020-21	PHI	11	32.5	28.1	10.5	3.4	1.0	1.5	9.2	17.9	51.3	1.5	3.7	39.0	8.3	9.9	83.5	63.1	1.5	9.1	3.8	357	309	116	37	11	16	42	33	+121
15	Donte DiVincenzo D. DiVincenzo	104.5	2020-21	MIL	3	23.3	2.7	6.3	2.7	1.0	0.3	1.0	5.3	18.8	0.7	4.0	16.7	0.0	0.0		25.0	0.7	5.7	2.0	70	8	19	8	3	1	6	4	+12
16	Giannis Antetokounmpo G. Antetokounmpo	104.7	2020-21	MIL	21	38.0	30.2	12.8	5.1	1.0	1.2	11.9	20.9	56.9	0.6	3.3	18.6	5.8	9.8	58.7	59.9	2.8	10.0	3.0	799	634	269	108	21	25	64	61	+130
17	Nic Claxton N. Claxton	104.8	2020-21	BKN	12	10.8	2.5	2.8	0.6	0.3	1.0	1.2	2.4	48.3	0.0	0.0		0.2	0.3	66.7	49.5	1.2	1.6	0.3	129	30	33	7	4	12	4	20	+11
18	Kris Dunn K. Dunn	104.8	2020-21	ATL	5	6.6	1.2	1.0	1.0	0.4	0.4	0.2	1.0	20.0	0.0	0.2	0.0	0.8	0.8	100.0	44.4	0.0	1.0	0.8	33	6	5	5	2	2	4	5	+9
19	Dwight Howard D. Howard	105.0	2020-21	PHI	12	12.4	4.7	6.3	0.7	0.2	0.5	1.3	2.5	53.3	0.0	0.1	0.0	2.0	3.3	60.0	58.8	2.2	4.1	1.0	149	56	75	8	2	6	12	31	-34
20	Kevin Durant K. Durant	105.1	2020-21	BKN	12	40.4	34.3	9.3	4.4	1.5	1.6	12.1	23.5	51.4	2.8	6.8	40.2	7.3	8.4	87.1	63.0	0.4	8.8	3.5	485	411	111	53	18	19	42	31	+34
21	Matisse Thybulle M. Thybulle	105.4	2020-21	PHI	12	18.3	5.3	1.4	0.3	1.3	0.9	2.1	4.3	48.1	0.9	2.8	32.4	0.2	0.4	40.0	58.1	0.3	1.1	0.2	220	63	17	3	16	11	2	29	-43
22	Elijah Bryant E. Bryant	105.6	2020-21	MIL	11	4.5	1.3	1.1	0.4	0.2	0.1	0.6	1.8	35.0	0.0	0.7	0.0	0.0	0.0		35.0	0.2	0.9	0.2	50	14	12	4	2	1	2	1	-21
23	Taj Gibson T. Gibson	105.6	2020-21	NYK	5	27.6	5.0	7.0	0.8	1.6	1.0	2.4	4.0	60.0	0.0	0.0		0.2	0.2	100.0	61.2	3.2	3.8	0.6	138	25	35	4	8	5	3	13	-7
24	Marc Gasol M. Gasol	106.1	2020-21	LAL	5	17.4	5.2	3.8	3.0	0.8	0.8	1.6	2.6	61.5	1.4	2.2	63.6	0.6	0.8	75.0	88.1	0.8	3.0	0.8	87	26	19	15	4	4	4	16	-31
25	Bobby Portis B. Portis	106.1	2020-21	MIL	20	18.3	8.8	5.0	0.6	0.7	0.4	3.5	7.6	46.4	0.9	2.6	34.6	0.9	1.3	72.0	54.3	1.7	3.4	0.5	366	176	100	12	14	7	9	31	+69