The race meeting at the Gran Premio Motul de la Republica Argentina, which was set to take place from April 17-19, is the third to be moved due to the coronavirus outbreak.
Organisers also announced the Valencia Grand Prix - at the Gran Premio Motul de la Comunitat Valenciana - will now be held from November 27-29.
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The Americas Grand Prix in Texas has also changed slot to November 13-15.
The 2020 MotoGP season is now set to begin in Jerez with the Gran Premio Red Bull de España scheduled to commence May 1-3.
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