The 2021 BAL group phase began on 16 May 2021 and ended on 24 May 2021. A total of 12 teams competed in the group stage to decide the 8 places in the 2021 BAL Playoffs.

Initially, it was planned that in the regular season, twelve teams play in two Conferences with six teams each. Each team will play five games, one against each opponent, inside its conference. The top three teams from each conference advance to the Super 6.^[1] The games will be played in six arenas divided over the African continent.^[1] The regular season will start in March 2020.

The format was changed to a group phase as a result of the COVID-19 pandemic. In three groups of four each team plays the other one time and the first, second and best third-placed teams advance to the playoffs.^[2]

Pos	Team v t e	Pld	W	L	PF	PA	PD	Pts	Qualification		USM	PAT	RIV	GNB
1	US Monastir	3	3	0	303	211	+92	6	Advance to playoffs		—	—	91–75	—
2	Patriots (H)	3	2	1	236	223	+13	5			—	—	83–60	78–72
3	Rivers Hoopers	3	1	2	210	251	−41	4			70–99	—	—	—
4	GNBC	3	0	3	207	271	−64	3			66–113	—	69–80	—

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Pos	Team v t e	Pld	W	L	PF	PA	PD	Pts	Qualification		PDL	ASS	FAP	POL
1	Petro de Luanda	3	3	0	247	208	+39	6	Advance to playoffs		—	97–78	—	84–66
2	AS Salé	3	2	1	253	260	−7	5			—	—	87–84	88–79
3	FAP	3	1	2	235	218	+17	4			64–66	—	—	87–65
4	AS Police	3	0	3	210	259	−49	3				—	—	—

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Pos	Team v t e	Pld	W	L	PF	PA	PD	Pts	Qualification		ZAM	FVM	ASD	GSP
1	Zamalek	3	3	0	254	181	+73	6	Advance to playoffs		—	71–55	—	97–64
2	Ferroviário de Maputo	3	2	1	229	218	+11	5			—	—	88–74	—
3	AS Douanes	3	1	2	230	250	−20	4			62–86	—	—	94–76
4	GS Pétroliers	3	0	3	213	277	−64	3			—	73–86	—	—

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Pos	Grp	Team v t e	Pld	W	L	PF	PA	PD	Pts	Qualification
1	B	FAP	3	1	2	235	218	+17	4	Advance to playoffs
2	C	AS Douanes	3	1	2	230	250	−20	4
3	A	Rivers Hoopers	3	1	2	210	251	−41	4