El Mundial de Motocross Júnior se celebrará el 31 de julio y 1 de agosto de 2021 en Grecia y contará con hasta quince pilotos españoles.
El evento reunirá a corredores de 23 países diferentes que no solo competirán por su país, sino también para ellos mismos para ser coronados Campeones del Mundo Junior y Campeones de la Copa del Mundo de 65cc.
En las carreras participarán tres clases con 65cc, 85cc y 125cc. Estos son los nombres de todos los inscritos:
| ENTRY LIST 125cc | |||||||
| No | RIDER | FMN | NAT | MOTORCYCLE | TEAM | ||
| 1 | 3 | Lata | Valerio | FMI | ITA | KTM | MRT Racing Team KTM |
| 2 | 6 | Escandell | Elias | RFME | ESP | GASGAS | |
| 3 | 8 | Viano | Andrea | FMI | ITA | Husqvarna | |
| 4 | 9 | Garcia | Francisco | RFME | ESP | Husqvarna | |
| 5 | 11 | Ordog | Zoltan | FRM | ROU | Yamaha | |
| 6 | 15 | Karu | Romeo | EMF | EST | Husqvarna | |
| 7 | 24 | Georgiev | Hristian | BMF | BUL | KTM | |
| 8 | 33 | Karssemakers | Kay | KNMV | NED | Husqvarna | |
| 9 | 43 | Lusis | Roberts | LAMSF | LAT | KTM | |
| 10 | 44 | Habeanu | Dennis Stefan | FRM | ROU | Yamaha | |
| 11 | 47 | Reisulis | Karlis Alberts | LAMSF | LAT | Yamaha | |
| 12 | 49 | Kanakis | Marios | BMF | BUL | KTM | |
| 13 | 54 | Demsic | Tilen | AMZS | SLO | Husqvarna | |
| 14 | 77 | Melman | Erez | IMSF | ISR | KTM | |
| 15 | 78 | Fragoso | Daniel | FMM | MEX | GASGAS | |
| 16 | 79 | Salvini | Nicola | FMI | ITA | Husqvarna | |
| 17 | 84 | Pavlopoulos | Kamarinos | AMOTOE | GRE | KTM | |
| 18 | 99 | Gkalipis | Georgios | AMOTOE | GRE | KTM | |
| 19 | 112 | Ellina | Aristodimos | CyMF | CYP | Fantic | |
| 20 | 141 | Ganotis | Dimitrios | AMOTOE | GRE | Yamaha | |
| 21 | 199 | Vagenas | Georgios | AMOTOE | GRE | Husqvarna | |
| 22 | 202 | Maj | Adam | ACCR | CZE | KTM | KTM Kosak Team |
| 23 | 207 | Cazal | Xavier | FFM | FRA | KTM | Team VHR KTM Racing |
| 24 | 213 | Deboutez | Noah | FMB | BEL | Husqvarna | |
| 25 | 214 | Pergel | Bence | MAMS | HUN | KTM | |
| 26 | 222 | Tassis | Angelos | AMOTOE | GRE | GASGAS | |
| 27 | 227 | Gutierrez | Pablo | RFME | ESP | GASGAS | |
| 28 | 241 | Duhamel | Nicolas | FFM | FRA | KTM | |
| 29 | 252 | Sanchez | Raul | RFME | ESP | GASGAS | |
| 30 | 282 | Rossi | Marc-Antoine | FFM | FRA | KTM | |
| 31 | 299 | Vangelakakis | Savros | AMOTOE | GRE | KTM | |
| 32 | 312 | Osterhagen | Haakon | NMF | NOR | Fantic | |
| 33 | 344 | Theodoridis | Sotirios | AMOTOE | GRE | GASGAS | |
| 34 | 365 | Monne Viles | Adria | RFME | ESP | GASGAS | |
| 35 | 420 | Rossi | Andrea | FMI | ITA | KTM | |
| 36 | 432 | Van Erp | Ivano | KNMV | NED | Yamaha | |
| 37 | 612 | Parn | Joosep | EMF | EST | KTM | |
| 38 | 669 | Ruffini | Luca | FMI | ITA | GASGAS | |
| 39 | 684 | Freibergs | Uldis | LAMSF | LAT | Husqvarna | |
| 40 | 747 | Orlov | Aleksey | MFR | MFR | Husqvarna | |
| 41 | 911 | Blumfelds | Rauls | LAMSF | LAT | KTM |
85cc Entry List
| ENTRY LIST 85cc | ||||||
| No | RIDER | FMN | NAT | MOTORCYCLE | ||
| 1 | 5 | Almagor | Ben | IMSF | ISR | KTM |
| 2 | 8 | Toshev | Vencislav | BMF | BUL | Husqvarna |
| 3 | 12 | Diaz | Lorenzo | FMM | MEX | KTM |
| 4 | 24 | Salvador | Carlos | RFME | ESP | GASGAS |
| 5 | 77 | Stefanescu | Tudor | FRM | ROU | Yamaha |
| 6 | 85 | Banu | Mihnea Andrei | FRM | ROU | Yamaha |
| 7 | 89 | Stefanov | Danail | BMF | BUL | GASGAS |
| 8 | 94 | Fotakis | Sotiris | AMOTOE | GRE | TM |
| 9 | 97 | Mancini | Simone | FMI | ITA | KTM |
| 10 | 102 | Mantovani | Filippo | FMI | ITA | KTM |
| 11 | 111 | Merkouris | Konstantinos | AMOTOE | GRE | KTM |
| 12 | 125 | Barbieri | Mattia | FMI | ITA | GASGAS |
| 13 | 142 | Bialy | Noam | IMSF | ISR | KTM |
| 14 | 177 | Papadakis | Eleftherios | AMOTOE | GRE | KTM |
| 15 | 188 | Orlov | Ferenc | MAMS | HUN | Husqvarna |
| 16 | 194 | Anagnostopoulos | Panagiotis | AMOTOE | GRE | KTM |
| 17 | 210 | Maindru | Amaury | FFM | FRA | KTM |
| 18 | 238 | Brunet | Tom | FFM | FRA | Husqvarna |
| 19 | 242 | Gaspari | Alessandro | FMI | ITA | Husqvarna |
| 20 | 270 | Tzemach | Ofir Casey | IMSF | ISR | Husqvarna |
| 21 | 295 | Faure | Mano | FFM | FRA | GASGAS |
| 22 | 300 | Perez | Salvador | RFME | ESP | Yamaha |
| 23 | 337 | Miro | Bruno | RFME | ESP | Husqvarna |
| 24 | 342 | Oven | Zan | AMZS | SLO | Husqvarna |
| 25 | 356 | Puerto | Bruno | RFME | ESP | GASGAS |
| 26 | 383 | Badenas Tejada | Enzo | RFME | ESP | Husqvarna |
| 27 | 394 | Busatto | Patrick | FMI | ITA | GASGAS |
| 28 | 401 | Van Drunen | Lotte | KNMV | NED | KTM |
| 29 | 423 | Zimek | Premysl | ACCR | CZE | KTM |
| 30 | 479 | Marek | Vitezslav | ACCR | CZE | KTM |
| 31 | 507 | Gustavsson | Otto | SVEMO | SWE | KTM |
| 32 | 518 | Van Mechgelen | Douwe | FMB | BEL | Husqvarna |
| 33 | 522 | Vrh | Miha | AMZS | SLO | Husqvarna |
| 34 | 527 | Kennedy | Mick | KNMV | NED | Yamaha |
| 35 | 611 | Kokins | Markuss | LAMSF | LAT | Husqvarna |
| 36 | 637 | Paju | Jan-Marten | EMF | EST | Husqvarna |
| 37 | 641 | Saicans | Tomas | LAMSF | LAT | Husqvarna |
| 38 | 654 | Koiv | Jasper | EMF | EST | KTM |
| 39 | 688 | Hunt | Karl | EMF | EST | KTM |
| 40 | 701 | Adomaitis | Marius | LMSF | LTU | Husqvarna |
| 41 | 714 | Ozolins | Markuss | LAMSF | LAT | Husqvarna |
| 42 | 716 | Zanócz | Noel | MAMS | HUN | Husqvarna |
| 43 | 732 | Mardo | Tristen | EMF | EST | KTM |
| 44 | 744 | Leok | Sebastian | EMF | EST | Husqvarna |
| 45 | 747 | Rybakov | Semen | MFR | MFR | KTM |
| 46 | 772 | Reisulis | Janis Martins | LAMSF | LAT | KTM |
| 47 | 919 | Ernecker | Maximilian | AMF | AUT | GASGAS |
65cc Entry List
| ENTRY LIST 65cc | ||||||
| No | RIDER | FMN | NAT | MOTORCYCLE | ||
| 1 | 11 | Diaz | Bernardo | FMM | MEX | KTM |
| 2 | 14 | Moreno | Jose Luis | RFME | ESP | KTM |
| 3 | 21 | Chatzakis | Georgios | AMOTOE | GRE | Yamaha |
| 4 | 24 | Trakadas | Andreas | AMOTOE | GRE | KTM |
| 5 | 25 | Tsalikis | Georgios | AMOTOE | GRE | Yamaha |
| 6 | 26 | Sinai | Avihu | IMSF | ISR | KTM |
| 7 | 27 | Parejo | Alonso | RFME | ESP | KTM |
| 8 | 28 | Gregoire | Dean | KNMV | NED | KTM |
| 9 | 33 | Tzortzopoulos | Dimitrios-Georgios | AMOTOE | GRE | Husqvarna |
| 10 | 96 | Tsankov | Dani | BMF | BUL | Yamaha |
| 11 | 109 | Weinberg | Itay | IMSF | ISR | KTM |
| 12 | 111 | van den Broek | Dex | KNMV | NED | KTM |
| 13 | 125 | Koukaliotis | Georgios | AMOTOE | GRE | Yamaha |
| 14 | 183 | Sarovs | Rems | LAMSF | LAT | KTM |
| 15 | 210 | Dumitru | Sami Alexandru | FRM | ROU | Yamaha |
| 16 | 214 | Diss-Fenard | Léo | FFM | FRA | KTM |
| 17 | 215 | Riganti | Edoardo | FMI | ITA | Yamaha |
| 18 | 217 | Izaguirre | Juan | RFME | ESP | Husqvarna |
| 19 | 225 | Salvador | Jorge | RFME | ESP | GASGAS |
| 20 | 234 | Bogdanovs | Denijs | LAMSF | LAT | KTM |
| 21 | 244 | Lagain | Tylan | FFM | FRA | Yamaha |
| 22 | 267 | Juric | Luka | AMZS | SLO | KTM |
| 23 | 277 | Diez Arnal | Iker | RFME | ESP | Yamaha |
| 24 | 280 | Szoke Eross | Mark | FRM | ROU | Husqvarna |
| 25 | 350 | Goyer | Sleny | FFM | FRA | GASGAS |
| 26 | 353 | Uccellini | Andrea | FMI | ITA | Husqvarna |
| 27 | 503 | Pojar | Stanislav | ACCR | CZE | KTM |
| 28 | 520 | Zimmerman | Maxim | SMF | SVK | Husqvarna |
| 29 | 550 | Gumeniuc | Theodora Ioana | FRM | ROU | Yamaha |
| 30 | 602 | Allas | Aston | EMF | EST | Husqvarna |
| 31 | 618 | Teesalu | Karl | EMF | EST | KTM |
| 32 | 715 | Peilman | Enriko | EMF | EST | KTM |
| 33 | 741 | Slavec | Val | AMZS | SLO | KTM |
| 34 | 742 | Lustus | Enri | EMF | EST | Husqvarna |
| 35 | 777 | Amali | Cristian | FMI | ITA | KTM |
| 36 | 810 | Vidovic | Tai | AMZS | SLO | Husqvarna |
| 37 | 817 | Katona | Áron | MAMS | HUN | Husqvarna |
| 38 | 910 | Ceccarelli | Giovanni | FMI | ITA | KTM |
| 39 | 919 | Khomitsevich | Maksim | MFR | MFR | Husqvarna |
| 40 | 929 | Ernecker | Moritz | AMF | AUT | GASGAS |
