Bernie Ecclestone has again sowed doubts about New Jersey's GP America, after revealing that the existing contract for the June 2013 race had been annulled.
The provisional 2013 schedule circulated during last weekend's Singapore Grand Prix had the second American event slated for a mid-June date. That was despite previous suggestions of the New Jersey project encountering difficulties, and the departure of its chief Tom Cotter in August.
Ecclestone told Britain's Guardian newspaper that New Jersey organizers "have not complied with the terms and conditions of the contract, which is now gone anyway. They don't have a contract."
But although the 2013 calendar is set to be finalized at an FIA World Motor Sport Council meeting on Friday, Ecclestone said there was still hope for New Jersey.
"We are pretty close to the final deadline," he said. "We have got a World Council meeting coming up.
"I think if somebody got behind them it could happen in 2013 because they have come a long way with the circuit."
F1 will return to to the United States after a five-year absence with the inaugural race at Austin's Circuit of The Americas in November.