Warren Zaïre-Emery has made the most career appearances by a player younger than 20 in the Champions League, with 37 appearances.

most appearances by a player before turning 20 years old all competitions

	NAME	M	Rating	MIN	START	G	G/M	A	G+A	PK	FK	SH	SOT	WOOD	TCH	TCH-BOX	OFF
1	Warren Zaïre-Emery W. Zaïre-Emery	37	7.15	2,415	26	2	0.05	4	6	0	0	28	5	1	1,873	59	1
2	Lamine Yamal L. Yamal	33	7.49	2,544	30	11	0.33	9	20	3	0	109	41	4	2,010	216	5
3	Pau Cubarsí P. Cubarsí	26	6.58	1,989	24	0	0.00	1	1	0	0	6	3	0	1,886	11	0
4	Cesc Fàbregas C. Fàbregas	26		2,049	22	2	0.08			0
5	Jude Bellingham J. Bellingham	23		1,819	21	6	0.26	5	11	0	0	35	12	0	1,427	63	1
6	Kylian Mbappé K. Mbappé	23		1,715	20	13	0.57	7	20	0	0	63	32	1	863	162	17
7	Bojan	23		787	7	5	0.22			1
8	Iker Casillas I. Casillas	23		2,070	23	0	0.00			0
9	Roque Santa Cruz R. Santa Cruz	21		775	7	1	0.05			0
10	Myles Lewis-Skelly M. Lewis-Skelly	20	7.00	1,264	15	0	0.00	3	3	0	0	5	1	1	759	13	0
11	Jamal Musiala J. Musiala	20		999	11	2	0.10	3	5	0	0	18	8	1	629	69	1
12	Nigel de Jong N. de Jong	20		1,300	14	2	0.10			0
13	Eduardo Camavinga E. Camavinga	19		836	7	0	0.00	1	1	0	0	8	2	0	653	17	1
14	Patrick Kluivert P. Kluivert	18		1,086	11	7	0.39			0
15	Theo Walcott T. Walcott	17		678	6	3	0.18			0
16	Désiré Doué D. Doué	16	7.27	740	8	5	0.31	3	8	0	0	32	17	2	550	49	4
17	Geovany Quenda G. Quenda	16	6.79	1,125	13	2	0.13	3	5	0	0	18	7	1	655	35	0
18	Mathys Tel M. Tel	16	6.88	381	2	2	0.13	1	3	0	0	24	6	1	266	36	2
19	Ansu Fati A. Fati	16		576	5	3	0.19	2	5	0	0	25	9	0	426	57	2
20	Rúben Neves R. Neves	16		747	7	0	0.00	1	1	0	0	10	1	0	503		0
21	Max Meyer M. Meyer	16		869	9	1	0.06	1	2	0
22	Nwankwo Kanu N. Kanu	16		985	10	1	0.06			0
23	Brian Kidd B. Kidd	16		1,440	16	3	0.19			0
24	João Simões J. Simões	15	6.76	881	12	0	0.00	1	1	0	0	7	4	0	559	11	0
25	Senny Mayulu S. Mayulu	15	7.24	492	5	4	0.27	0	4	0	0	21	7	2	290	36	0