Formula 1 supremo Bernie Ecclestone has refused to confirm that the scheduled Grand Prix of America in New Jersey will go ahead next year.
The race, which is designed to have Manhattan as a backdrop, has been far from certain because of problems with payments.
Ecclestone said: "The organisers have not complied with the terms and conditions of the contract, which is now gone anyway. They don't have a contract."
A final decision on the race is due to be made at a meeting of the World Motor Sport Council on Friday, with an axe at the moment looking more likely than confirmation.
See below for the current provisional calendar for next year.
Provisional F1 2013 Calendar:
March 17 - Australia (Melbourne)
March 24 - Malaysia (Sepang)
April 14 - China (Shanghai)
April 21 - Bahrain (Sakhir)
May 12 - Spain (Barcelona)
May 26 - Monaco
June 9 - Canada (Montreal)
June 16 - America (New Jersey) *
June 30 - Britain (Silverstone)
July 21 - Germany (Nurburgring/Hockenheim)
July 28 - Hungary (Hungaroring)
September 1 - Belgium (Spa-Francorchamps)
September 8 - Italy (Monza)
September 22 - Singapore (Marina Bay) *
October 6 - Japan (Suzuka)
October 13 - Korea (Yeongam) *
October 27 - India (Buddh International)
November 3 - Abu Dhabi (Yas Marina)
November 17 - United States (Austin)
November 24 - Brazil (Interlagos)
*subject to confirmation
