Il successo nelle MotoGP nel GP d'Argentina è andato a Marco Bezzecchi. Sotto il cielo plumbeo di Termas de Rio Hondo e sulla pista bagnata, l'italiano ha fatto corsa solitaria per precedere Johann Zarco, autore di una grande rimonta nel finale che lo ha portato a superare Alex Marquez, partito dalla pole position. Francesco Bagnaia è invece scivolato poco dopo aver superato lo spagnolo, ed ha concluso nelle retrovie.
Per il 24enne di Rimini, ora in testa alla graduatoria, si tratta del primo successo della carriera nella classe regina, dopo le tre vittorie colte in Moto3 e le tre ottenute in Moto2, due categorie che lo avevano visto concludere terzo nel Mondiale prima del salto alla cilindrata superiore.
Nelle Moto2, l'unica corsa disputata in formato accorciato, il successo è andato all'italiano Tony Arbolino. Nelle Moto3 ad imporsi è invece stato il giapponese Tatsuki Suzuki.
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