The MotoGP season will not begin until mid-June after the Italian and Catalan races were postponed on Tuesday due to the coronavirus pandemic.
The decision brings the number of postponed races to seven, while the 8 March first round in Qatar was cancelled.
Italy and Spain, where a majority of riders and teams come from, are the two European countries worst affected by the virus, with more than 16,000 deaths in Italy and 13,000 in Spain.
"The FIM, IRTA and Dorna Sports regret to announce the postponement of the Gran Premio d'Italia Oakley (31 May) and Gran Premi Monster Energy de Catalunya (7 June =)," MotoGP said in a statement.
"The ongoing coronavirus pandemic has obliged the two events to be rescheduled.
"As the situation remains in a state of constant evolution, new dates for these GPs, as well as the recently postponed French and Spanish GPs, cannot be confirmed until it becomes clearer when exactly it will be possible to hold the events."
MotoGP said a revised calendar will be published "as soon as available."
The German Grand Prix on 21 June is the next scheduled race in the calendar.
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