The 2023–24 UEFA Champions League group stage began on 19 September 2023 and ended on 13 December 2023. A total of 32 teams competed in the group stage to decide the 16 places in the knockout phase of the 2023–24 UEFA Champions League.

Union Berlin and Antwerp made their debut appearance in the group stage. This was the Belgian club's first appearance in the European Cup since their first round exit in the 1957–58 season, and the first ever for the German side. A total of 15 national associations were represented in the group stage.

This was the final season with the group stage format, which was replaced by the league stage format starting from the next season.^[1]

The draw for the group stage was held on 31 August 2023, 18:00 CEST, in Monaco. The 32 teams were drawn into eight groups of four. For the draw, the teams were seeded into four pots, each of eight teams, based on the following principles:

• Pot 1 contained the Europa League title holders, and the champions of the top seven associations based on their 2022–23 UEFA country coefficients.
• Pot 2, 3 and 4 contained the remaining teams, seeded based on their 2022–23 UEFA club coefficients.^[2]

Teams from the same association could not be drawn into the same group. Prior to the draw, UEFA formed pairings of teams from the same association (one pairing for associations with two or three teams, two pairings for associations with four or five teams) based on television audiences, where one team would be drawn into Groups A–D and another team would be drawn into Groups E–H, so that the two teams would play on different days. The following pairings were announced by UEFA after the group stage teams were confirmed:^[3]

On each matchday, one set of four groups played their matches on Tuesday, while the other set of four groups played their matches on Wednesday, with the two sets of groups alternating between each matchday. The fixtures were decided after the draw, using a computer draw not shown to public. Each team did not play more than two home matches or two away matches in a row, and played one home match and one away match on the first and last matchdays (Regulations Article 16.02).^[4]

Below were the participating teams (with their 2023 UEFA club coefficients),^[2] grouped by their seeding pot. They included:

• 26 teams which entered in this stage
• 6 winners of the play-off round (4 from Champions Path, 2 from League Path)

Key to colours
Group winners and runners-up advanced to round of 16
Third-placed teams entered Europa League knockout round play-offs

Pot 1 (by association rank) Assoc. Team Coeff. TH & 1 Manchester City 145.000 EL Sevilla 91.000 2 Barcelona 98.000 3 Napoli 81.000 4 Bayern Munich 136.000 5 Paris Saint-Germain 112.000 6 Benfica 82.000 7 Feyenoord 51.000

Pot 2 Team Coeff. Real Madrid 121.000 Manchester United 104.000 Inter Milan 96.000 Borussia Dortmund 86.000 Atlético Madrid 85.000 RB Leipzig 84.000 Porto 81.000 Arsenal 76.000

Pot 3 Team Notes Coeff. Shakhtar Donetsk 63.000 Red Bull Salzburg 59.000 Milan 50.000 Braga [LP] 44.000 PSV Eindhoven [LP] 43.000 Lazio 42.000 Red Star Belgrade 42.000 Copenhagen [CP] 40.500

Pot 4 Team Notes Coeff. Young Boys [CP] 34.500 Real Sociedad 33.000 Galatasaray [CP] 31.500 Celtic 31.000 Newcastle United 21.914 Union Berlin 17.000 Antwerp [CP] 17.000 Lens 12.232

Notes

In each group, teams played against each other home-and-away in a round-robin format. The top two teams of each group advanced to the round of 16. The third-placed teams were transferred to the Europa League knockout round play-offs, while the fourth-placed teams were eliminated from European competitions for the season.

Teams were ranked according to points (3 points for a win, 1 point for a draw, 0 points for a loss). If two or more teams were tied on points, the following tiebreaking criteria were applied, in the order given, to determine the rankings (see Article 17 Equality of points – group stage, Regulations of the UEFA Champions League):^[5]

1. Points in head-to-head matches among the tied teams;
2. Goal difference in head-to-head matches among the tied teams;
3. Goals scored in head-to-head matches among the tied teams;
4. If more than two teams were tied, and after applying all head-to-head criteria above, a subset of teams were still tied, all head-to-head criteria above were reapplied exclusively to this subset of teams;
5. Goal difference in all group matches;
6. Goals scored in all group matches;
7. Away goals scored in all group matches;
8. Wins in all group matches;
9. Away wins in all group matches;
10. Disciplinary points (direct red card = 3 points; double yellow card = 3 points; single yellow card = 1 point);
11. UEFA club coefficient.

The fixtures were announced on 2 September 2023, two days after the draw. The matches were played on 19–20 September, 3–4 October, 24–25 October, 7–8 November, 28–29 November and 12–13 December 2023. The scheduled kick-off times were 18:45 (two matches on each day) and 21:00 (remaining six matches) CET or CEST.

Times are CET or CEST,^{[note 1]} as listed by UEFA (local times, if different, are in parentheses).

Pos	Team v t e	Pld	W	D	L	GF	GA	GD	Pts	Qualification		BAY	CPH	GAL	MUN
1	Bayern Munich	6	5	1	0	12	6	+6	16	Advance to knockout phase		—	0–0	2–1	4–3
2	Copenhagen	6	2	2	2	8	8	0	8			1–2	—	1–0	4–3
3	Galatasaray	6	1	2	3	10	13	−3	5	Transfer to Europa League		1–3	2–2	—	3–3
4	Manchester United	6	1	1	4	12	15	−3	4			0–1	1–0	2–3	—

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Pos	Team v t e	Pld	W	D	L	GF	GA	GD	Pts	Qualification		ARS	PSV	LEN	SEV
1	Arsenal	6	4	1	1	16	4	+12	13	Advance to knockout phase		—	4–0	6–0	2–0
2	PSV Eindhoven	6	2	3	1	8	10	−2	9			1–1	—	1–0	2–2
3	Lens	6	2	2	2	6	11	−5	8	Transfer to Europa League		2–1	1–1	—	2–1
4	Sevilla	6	0	2	4	7	12	−5	2			1–2	2–3	1–1	—

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Pos	Team v t e	Pld	W	D	L	GF	GA	GD	Pts	Qualification		RMA	NAP	BRA	UNB
1	Real Madrid	6	6	0	0	16	7	+9	18	Advance to knockout phase		—	4–2	3–0	1–0
2	Napoli	6	3	1	2	10	9	+1	10			2–3	—	2–0	1–1
3	Braga	6	1	1	4	6	12	−6	4	Transfer to Europa League		1–2	1–2	—	1–1
4	Union Berlin	6	0	2	4	6	10	−4	2			2–3	0–1	2–3	—

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Pos	Team v t e	Pld	W	D	L	GF	GA	GD	Pts	Qualification		RSO	INT	BEN	SAL
1	Real Sociedad	6	3	3	0	7	2	+5	12[a]	Advance to knockout phase		—	1–1	3–1	0–0
2	Inter Milan	6	3	3	0	8	5	+3	12[a]			0–0	—	1–0	2–1
3	Benfica	6	1	1	4	7	11	−4	4[b]	Transfer to Europa League		0–1	3–3	—	0–2
4	Red Bull Salzburg	6	1	1	4	4	8	−4	4[b]			0–2	0–1	1–3	—

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Pos	Team v t e	Pld	W	D	L	GF	GA	GD	Pts	Qualification		ATM	LAZ	FEY	CEL
1	Atlético Madrid	6	4	2	0	17	6	+11	14	Advance to knockout phase		—	2–0	3–2	6–0
2	Lazio	6	3	1	2	7	7	0	10			1–1	—	1–0	2–0
3	Feyenoord	6	2	0	4	9	10	−1	6	Transfer to Europa League		1–3	3–1	—	2–0
4	Celtic	6	1	1	4	5	15	−10	4			2–2	1–2	2–1	—

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Pos	Team v t e	Pld	W	D	L	GF	GA	GD	Pts	Qualification		DOR	PAR	MIL	NEW
1	Borussia Dortmund	6	3	2	1	7	4	+3	11	Advance to knockout phase		—	1–1	0–0	2–0
2	Paris Saint-Germain	6	2	2	2	9	8	+1	8[a]			2–0	—	3–0	1–1
3	Milan	6	2	2	2	5	8	−3	8[a]	Transfer to Europa League		1–3	2–1	—	0–0
4	Newcastle United	6	1	2	3	6	7	−1	5			0–1	4–1	1–2	—

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Pos	Team v t e	Pld	W	D	L	GF	GA	GD	Pts	Qualification		MCI	RBL	YB	RSB
1	Manchester City	6	6	0	0	18	7	+11	18	Advance to knockout phase		—	3–2	3–0	3–1
2	RB Leipzig	6	4	0	2	13	10	+3	12			1–3	—	2–1	3–1
3	Young Boys	6	1	1	4	7	13	−6	4	Transfer to Europa League		1–3	1–3	—	2–0
4	Red Star Belgrade	6	0	1	5	7	15	−8	1			2–3	1–2	2–2	—

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Pos	Team v t e	Pld	W	D	L	GF	GA	GD	Pts	Qualification		BAR	POR	SHK	ANT
1	Barcelona	6	4	0	2	12	6	+6	12[a]	Advance to knockout phase		—	2–1	2–1	5–0
2	Porto	6	4	0	2	15	8	+7	12[a]			0–1	—	5–3	2–0
3	Shakhtar Donetsk	6	3	0	3	10	12	−2	9	Transfer to Europa League		1–0	1–3	—	1–0
4	Antwerp	6	1	0	5	6	17	−11	3			3–2	1–4	2–3	—

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