| MD | Players | Clubs | Nationality | DOB | A(D) |
|---|---|---|---|---|---|
| 17-Jul-2018 |  Otto Ollikainen | HJK Helsinki | Finland | 22-Jan-2001 | 17(176) |
| 10-Jul-2018 | Benjamin Cabango | The New Saints FC | Wales | 30-May-2000 | 18(41) |
| 17-Jul-2018 | Enoch Banza | HJK Helsinki | Finland | 04-Feb-2000 | 18(164) |
| 11-Jul-2018 | Erik Botheim | Rosenborg BK | Norway | 10-Jan-2000 | 18(183) |
| 10-Jul-2018 |  Sandro Kulenovic | Legia Warsaw | Croatia | 04-Dec-1999 | 18(219) |
| 21-Aug-2018 |  Joao Felix | Benfica | Portugal | 10-Nov-1999 | 18(285) |
| 25-Jul-2018 | Dario Maresic | Sturm Graz | Austria | 29-Sep-1999 | 18(300) |
| 07-Aug-2018 | Elif Elmas | Fenerbahce | Macedonia | 27-Sep-1999 | 18(315) |
| 25-Jul-2018 | Matthijs de Ligt | AFC Ajax | Netherlands | 12-Aug-1999 | 18(348) |
| 10-Jul-2018 | Eetu Vertainen | HJK Helsinki | Finland | 11-May-1999 | 19(60) |
| 10-Jul-2018 | Sebastian Szymanski | Legia Warsaw | Poland | 10-May-1999 | 19(61) |
| 18-Jul-2018 |  Michael Johnston | Celtic | Republic of Ireland | 19-Apr-1999 | 19(90) |
| 21-Aug-2018 |  Mauro Junior | PSV Eindhoven | Brazil | 06-May-1999 | 19(107) |
| 08-Aug-2018 | Hannes Wolf | Salzburg | Austria | 16-Apr-1999 | 19(114) |
| 10-Jul-2018 | Markus Poom | Flora Talinn | Estonia | 27-Feb-1999 | 19(133) |
| 10-Jul-2018 | Arbin Zejnulai | KF Shkendija | Macedonia | 15-Feb-1999 | 19(145) |
| 18-Jul-2018 | Vladan Bubanja | FK Sutjeska Niksic | Montenegro | 21-Feb-1999 | 19(147) |
| 26-Jun-2018 | Leutrim Kryeziu | FC Drita | Kosovo | 25-Jan-1999 | 19(152) |
| 18-Jul-2018 | Nermin Hajdarevic | HSK Zrinjski Mostar | Bosnia and Herzegovina | 10-Feb-1999 | 19(158) |
| 07-Aug-2018 | Gedson Fernandes | Benfica | Portugal | 09-Jan-1999 | 19(210) |
| 21-Aug-2018 | Donyell Malen | PSV Eindhoven | Netherlands | 19-Jan-1999 | 19(214) |
| 17-Jul-2018 | Ariagner Smith | FK Spartaks Jurmala | Nicaragua | 13-Dec-1998 | 19(216) |
| 11-Jul-2018 | Issah Abass | Olimpija Ljubljana | Ghana | 26-Sep-1998 | 19(288) |
| 08-Aug-2018 | Patson Daka | Salzburg | Zambia | 09-Oct-1998 | 19(303) |
| 28-Aug-2018 |  Nazariy Rusyn | Dynamo Kyiv | Ukraine | 25-Oct-1998 | 19(307) |
| 28-Aug-2018 | Mykola Shaparenko | Dynamo Kyiv | Ukraine | 04-Oct-1998 | 19(328) |
| 24-Jul-2018 | Leo Jaba | PAOK Salonika | Brazil | 02-Aug-1998 | 19(356) |
| 07-Aug-2018 | Moussa Djenepo | Standard Liege | Mali | 15-Jun-1998 | 20(53) |
| 24-Jul-2018 | Dimitris Limnios | PAOK Salonika | Greece | 27-May-1998 | 20(58) |
| 24-Jul-2018 |  Dani Olmo | Dinamo Zagreb | Spain | 07-May-1998 | 20(78) |
| 10-Jul-2018 | Kristoffer Ajer | Celtic | Norway | 17-Apr-1998 | 20(84) |
| 25-Jul-2018 | Kaj Sierhuis | AFC Ajax | Netherlands | 27-Apr-1998 | 20(89) |
| 10-Jul-2018 | Conor McCarthy | Cork City | Republic of Ireland | 11-Apr-1998 | 20(90) |
| 11-Jul-2018 | Baktiyor Zainutdinov | FC Astana | Kazakhstan | 02-Apr-1998 | 20(100) |
| 10-Jul-2018 | Kane Lewis | The New Saints FC | England | 17-Mar-1998 | 20(115) |
| 01-Aug-2018 | Sandi Lovric | Sturm Graz | Slovenia | 28-Mar-1998 | 20(126) |
| 17-Jul-2018 | Samuel Adrian | Malmo FF | Sweden | 02-Mar-1998 | 20(137) |
| 10-Jul-2018 | Shefit Shefiti | KF Shkendija | Albania | 19-Feb-1998 | 20(141) |
| 08-Aug-2018 | Aleksandr Maksimenko | Spartak Moscow | Russia | 19-Mar-1998 | 20(142) |
| 25-Jul-2018 | Carl Eiting | AFC Ajax | Netherlands | 11-Feb-1998 | 20(164) |
| 24-Jul-2018 |  Blas Riveros | FC Basel | Paraguay | 03-Feb-1998 | 20(171) |
| 11-Jul-2018 | Senad Jarovic | Spartak Trnava | Germany | 20-Jan-1998 | 20(172) |
| 10-Jul-2018 | Odsonne Edouard | Celtic | France | 16-Jan-1998 | 20(175) |
| 01-Aug-2018 | Max Wober | AFC Ajax | Austria | 04-Feb-1998 | 20(178) |
| 01-Aug-2018 | Eray Comert | FC Basel | Switzerland | 04-Feb-1998 | 20(178) |
| 11-Jul-2018 | Jean Borg | Valletta | Malta | 08-Jan-1998 | 20(184) |
| 08-Aug-2018 | Aleksandr Lomovitskiy | Spartak Moscow | Russia | 27-Jan-1998 | 20(193) |
| 14-Aug-2018 | Amadou Haidara | Salzburg | Mali | 31-Jan-1998 | 20(195) |
| 24-Jul-2018 | Frank Ogochukwu | FC Midtylland | Nigeria | 01-Jan-1998 | 20(204) |
| 24-Jul-2018 | Alexander Munksgaard | FC Midtylland | Denmark | 31-Dec-1997 | 20(205) |
MD = Match date,
DOB = Date Of Birth,
A(D) = Age(Days).