The Azerbaijan Grand Prix is set to be the latest race pulled from Formula One's coronavirus-hit schedule.
F1 bosses had earmarked the 7 June round as a potential start date for the new season after the opening seven grands prix were called off.
But it is understood that the race - which takes place on the streets of Azerbaijan's capital in Baku - will now be postponed, with an announcement expected on Monday.
Baku chiefs are hopeful that the race will be rescheduled later in the year.
The earliest the campaign can now start is at Montreal's Circuit Gilles Villeneuve on June 14 - but the likelihood of that is deeply uncertain given the fast-moving nature of the coronavirus pandemic.
Silverstone chiefs revealed they would provide fans with full refunds if the British Grand Prix, pencilled in for 19 July does not go ahead.
