| MD | Players | Clubs | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 05-Dec-2020 |  John Joe Patrick | Getafe | Spain | 24-Sep-2003 | 17(73) |
| 04-Oct-2020 |  Miguel Rodriguez | Celta Vigo | United States | 29-Apr-2003 | 17(159) |
| 13-Sep-2020 |  Yunus Musah | Valencia | England | 29-Nov-2002 | 17(289) |
| 27-Sep-2020 |  Pedri | Barcelona | Spain | 25-Nov-2002 | 17(307) |
| 27-Sep-2020 | Ansu Fati | Barcelona | Spain | 31-Oct-2002 | 17(332) |
| 25-Oct-2020 |  Yeremi Pino | Villarreal | Spain | 20-Oct-2002 | 18(6) |
| 20-Feb-2021 | Hugo Gonzalez | Valencia | Spain | 07-Feb-2003 | 18(14) |
| 27-Feb-2021 | Moriba Kourouma | Barcelona | Spain | 19-Jan-2003 | 18(40) |
| 01-Oct-2020 | Gabriel Veiga | Celta Vigo | Spain | 27-May-2002 | 18(128) |
| 08-Nov-2020 |  Angel Jimenez | Granada CF | Spain | 22-Jun-2002 | 18(140) |
| 26-Sep-2020 |  Javi Lopez | CD Alaves | Spain | 25-Mar-2002 | 18(186) |
| 13-Sep-2020 |  Ander Barrenetxea | Real Sociedad | Spain | 27-Dec-2001 | 18(261) |
| 25-Jan-2021 | Mamor Niang | Getafe | Senegal | 04-Feb-2002 | 18(356) |
| 20-Sep-2020 |  Sergio Arribas | Real Madrid | Spain | 30-Sep-2001 | 18(356) |
| 21-Feb-2021 | Facundo Pellistri | CD Alaves | Uruguay | 20-Dec-2001 | 19(63) |
| 30-Dec-2020 | Koba Koindredi | Valencia | France | 27-Oct-2001 | 19(64) |
| 13-Sep-2020 | Takefusa Kubo | Villarreal | Japan | 04-Jun-2001 | 19(101) |
| 19-Jan-2021 |  Jony Carmona | Elche CF | Spain | 25-Sep-2001 | 19(116) |
| 05-Dec-2020 |  Edgar Sevikyan | Levante | Russia | 08-Aug-2001 | 19(119) |
| 10-Jan-2021 | Stephane Keller | CD Alaves | Cameroon | 20-Aug-2001 | 19(143) |
MD = Match date,
DOB = Date Of Birth,
A(D) = Age(Days).