who has the most defensive rebounds in a game for the hawks

Dikembe Mutombo and Kevin Willis are tied for the most defensive boards for the Hawks in a game, with 20 boards.

Interpreted as:

Who has the most defensive rebounds in a regular-season game for the hawks?

	NAME	DREB	DATE	TM		OPP	MIN	PTS	REB	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	TOV	PF	+/-
1	Dikembe Mutombo D. Mutombo	20	1/6/2001	ATL	vs	ORL	38	4	24	0	0	2	2	6	33.3	0	0		0	2	0.0	29.1	4	3	3	-1
2	Kevin Willis K. Willis	20	12/3/1991	ATL	@	DAL	40	29	31	3	3	0	9	18	50.0	0	0		11	15	73.3	58.9	11	2	2
3	Kevin Willis K. Willis	19	3/29/1993	ATL	vs	POR	47	32	25	3	1	0	13	26	50.0	0	0		6	6	100.0	55.9	6	1	1
4	Kevin Willis K. Willis	19	2/3/1992	ATL	vs	SEA	43	24	23	3	1	2	9	17	52.9	0	3	0.0	6	7	85.7	59.8	4	4	2
5	Dan Roundfield D. Roundfield	19	1/2/1983	ATL	vs	KCK	40	17	22	3	2	6	6	15	40.0	0	0		5	8	62.5	45.9	3	5	4
6	Dan Roundfield D. Roundfield	19	1/2/1982	ATL	vs	NJN		19	24				8	16	50.0	0			3	4	75.0	53.5	5
7	Truck Robinson T. Robinson	19	3/11/1977	ATL	vs	DEN	41	13	20	2	0	0	4	13	30.8				5	5	100.0	42.8	1		1
8	Dwight Howard D. Howard	18	2/2/2017	ATL	@	HOU	37	24	23	3	1	2	11	13	84.6	0	0		2	3	66.7	83.8	5	5	1	+9
9	Dwight Howard D. Howard	18	12/17/2016	ATL	vs	CHA	35	10	23	1	1	0	4	6	66.7	0	0		2	4	50.0	64.4	5	1	4	-2
10	Josh Smith J. Smith	18	2/10/2012	ATL	@	ORL	47	23	19	5	0	3	9	22	40.9	1	2	50.0	4	6	66.7	46.7	1	4	0	+8
11	Dikembe Mutombo D. Mutombo	18	12/22/2000	ATL	@	TOR	41	4	20	1	1	8	2	10	20.0	0	0		0	0		20.0	2	1	2	+12
12	Dikembe Mutombo D. Mutombo	18	4/18/2000	ATL	vs	NJN	48	13	22	0	3	7	6	13	46.2	0	0		1	2	50.0	46.8	4	2	1	+23
13	Dikembe Mutombo D. Mutombo	18	12/14/1999	ATL	vs	MIN	41	27	29	3	0	6	11	11	100.0	0	0		5	7	71.4	95.9	11	5	2	+13
14	Kevin Willis K. Willis	18	2/11/1992	ATL	vs	CHA	39	16	21	6	2	2	6	10	60.0	0	0		4	5	80.0	65.6	3	7	4
15	Dwight Howard D. Howard	17	1/7/2017	ATL	@	DAL	31	15	20	0	1	0	4	10	40.0	0	0		7	9	77.8	53.7	3	1	1	+15
16	Josh Smith J. Smith	17	3/27/2011	ATL	@	CLE	39	13	18	8	1	2	5	16	31.3	0	0		3	6	50.0	34.9	1	2	4	+8
17	Al Horford A. Horford	17	12/26/2009	ATL	@	IND	43	25	19	2	0	5	11	14	78.6	0	0		3	3	100.0	81.6	2	2	2	+18
18	Al Horford A. Horford	17	2/27/2009	ATL	vs	MIA	43	21	22	1	0	1	8	14	57.1	0	0		5	7	71.4	61.5	5	3	3	+8
19	Dikembe Mutombo D. Mutombo	17	1/31/2001	ATL	vs	TOR	41	21	29	0	1	6	8	12	66.7	0	0		5	6	83.3	71.7	12	1	2	+7
20	Dikembe Mutombo D. Mutombo	17	1/15/2001	ATL	vs	NJN	36	11	22	0	0	5	3	7	42.9	0	0		5	6	83.3	57.1	5	4	2	-10
21	Dikembe Mutombo D. Mutombo	17	1/2/2001	ATL	vs	BOS	37	5	19	2	0	2	0	4	0.0	0	0		5	6	83.3	37.7	2	2	3	+5
22	Dikembe Mutombo D. Mutombo	17	12/26/2000	ATL	@	NJN	41	12	28	0	1	5	2	8	25.0	0	0		8	8	100.0	52.1	11	2	3	+4
23	Dikembe Mutombo D. Mutombo	17	3/7/2000	ATL	@	CHI	39	12	21	4	0	5	5	7	71.4	0	0		2	3	66.7	72.1	4	2	1	-7
24	Dikembe Mutombo D. Mutombo	17	2/28/2000	ATL	@	GSW	43	13	22	2	0	3	4	8	50.0	0	0		5	5	100.0	63.7	5	3	4	+6
25	Dikembe Mutombo D. Mutombo	17	2/18/2000	ATL	@	PHX	39	12	25	2	0	4	2	6	33.3	0	0		8	10	80.0	57.7	8	4	0	-10