The future of the A1GP series has been thrown into doubt, with sources suggesting that Ferrari has withdrawn its supply of engines for the championship.
The new season was supposed to open with a round at Surfers Paradise in Australia on October 25, but there have been rumours for weeks now that the series has been struggling to put its finances in place.
Now there are suggestions that its plans have suffered a major blow, with Ferrari stopping its supply of power units to the championship for unspecified reasons.
Any move by Ferrari to withdraw its supply of engines would leave A1GP organisers with a race against time to secure new power-units ahead of the first planned running of the new campaign.
An A1GP test has been pencilled in for October 17 at Queensland Raceway in Australia, ahead of the Surfers Paradise event.
Ferrari would not confirm the situation when contacted by AUTOSPORT, however. A spokesman for the company said: "We have no comment to make on this matter at the moment."
A1GP organisers have been unavailable for comment regarding the situation about the new season.