After crashing during the first race of the Argentinian Grand Prix while fighting for a top-five finish, Andrea Bonacorsi was then forced to retire from the second race due to severe pain in his side. Having returned to Italy and undergone tests, the 22-year-old is still recovering and will therefore not ride his Desmo450 MX machine in the next MXGP round, scheduled for this weekend at the new Almonte circuit in Andalusia.

Ferruccio Zanchi's return to MX2 has been postponed, having injured his hand during training in preparation for the Argentinian Grand Prix; he was replaced by Simone Mancini in the Bariloche race. The nineteen-year-old will return to racing once he is fully recovered, while Mancini will make his debut in Almonte, as planned, in the 250 European Championship with the Desmo250 MX.