The Circuit of the Americas has moved to play down fears its 2012 US grand prix project is under threat.

Circuit of the Americas asks fans to support them
Circuit of the Americas asks fans to support them

Photo by: Circuit of the Americas

The Texas state funding for the project is reportedly in doubt, after a group of taxpayers filed legal action against the public comptroller, and the Austin City Council delayed a crucial vote on the receipt of the money.

"(The) council voted to delay taking action this past week," the circuit confirmed in a statement, "but all indications are they will provide the official endorsement once event contract details are finalised."

The document however urged supporters of the event, which is provisionally scheduled to make its Formula One debut mid next year, to apply pressure on the Austin council.

"It is important for council members to know of your support because they have been asked to officially endorse the race," said the Circuit of the Americas, directing supporters to the austinf1facts.com website.

"Urge them to support endorsement of the race and let them know you want to see Formula One come to the US once again."

The delayed council meeting takes place on Wednesday.