| MD | Players | Clubs | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 25-Aug-2019 |  Ansu Fati | Barcelona | Guinea-Bissau | 31-Oct-2002 | 16(298) |
| 17-Aug-2019 |  Ander Barrenetxea | Real Sociedad | Spain | 27-Dec-2001 | 17(233) |
| 04-Jan-2020 |  German Valera | Atletico Madrid | Spain | 16-Mar-2002 | 17(294) |
| 17-Aug-2019 |  Iker Losada | Celta Vigo | Spain | 01-Aug-2001 | 18(16) |
| 01-Sep-2019 |  Takefusa Kubo | RCD Mallorca | Japan | 04-Jun-2001 | 18(89) |
| 01-Sep-2019 |  Kangin Lee | Valencia | South Korea | 19-Feb-2001 | 18(194) |
| 30-Aug-2019 |  Bryan Gil Salvatierra | Sevilla | Spain | 11-Feb-2001 | 18(200) |
| 25-Aug-2019 |  Borja Sainz | CD Alaves | Spain | 01-Feb-2001 | 18(205) |
| 25-Sep-2019 |  Rodrygo | Real Madrid | Brazil | 09-Jan-2001 | 18(259) |
| 18-Jan-2020 | Sergio Camello | Atletico Madrid | Spain | 10-Feb-2001 | 18(342) |
| 17-Aug-2019 | Vinicius Junior | Real Madrid | Brazil | 12-Jul-2000 | 19(35) |
| 20-Sep-2019 |  Ismael Gutierrez | Real Betis | Spain | 07-Aug-2000 | 19(43) |
| 25-Aug-2019 | Diego Lainez | Real Betis | Mexico | 09-Jul-2000 | 19(46) |
| 14-Dec-2019 | Manuel Sanchez | Atletico Madrid | Spain | 24-Aug-2000 | 19(111) |
| 16-Aug-2019 |  Oihan Sancet | Athletic Bilbao | Spain | 25-Apr-2000 | 19(112) |
| 01-Sep-2019 | Rodrigo Riquelme | Atletico Madrid | Spain | 02-Apr-2000 | 19(151) |
| 17-Aug-2019 | Ferran Torres | Valencia | Spain | 29-Feb-2000 | 19(169) |
| 20-Oct-2019 |  Victor Perea | Espanyol | Spain | 01-Apr-2000 | 19(201) |
| 28-Sep-2019 | Jean-Clair Todibo | Barcelona | France | 30-Dec-1999 | 19(272) |
| 18-Aug-2019 | Joao Felix | Atletico Madrid | Portugal | 10-Nov-1999 | 19(281) |
| 25-Aug-2019 | Alexander Isak | Real Sociedad | Sweden | 21-Sep-1999 | 19(338) |
| 24-Aug-2019 |  Pedro Porro | Real Valladolid | Spain | 13-Sep-1999 | 19(345) |
| 31-Aug-2019 | Miguel de la Fuente | Real Valladolid | Spain | 03-Sep-1999 | 19(362) |
| 01-Dec-2019 |  Hugo Duro | Getafe | Spain | 10-Nov-1999 | 20(21) |
| 07-Dec-2019 | Pol Lozano | Espanyol | Spain | 06-Oct-1999 | 20(62) |
| 19-Oct-2019 | Brahim Diaz | Real Madrid | Spain | 03-Aug-1999 | 20(77) |
| 17-Aug-2019 |  Samuel Chukwueze | Villarreal | Nigeria | 22-May-1999 | 20(87) |
| 18-Aug-2019 | Mohammed Salisu | Real Valladolid | Benin | 17-Apr-1999 | 20(123) |
MD = Match date,
DOB = Date Of Birth,
A(D) = Age(Days).