Karun Chandhok, Red Bull demo in Korea

Formula 1 commercial rights boss Bernie Ecclestone has admitted there are doubts about whether the Korean Grand Prix will take place this year.

The race has been surrounded by doubts for months, although organizers were adamant the circuit would be ready in time for next month's race during a Red Bull "pre-run" on the still-unfinished circuit earlier this month (LEFT). The inaugural Korean GP is scheduled for Oct. 24, and an FIA inspection was expected on Sept. 21, but that has been delayed. Korean officials attended the Singapore GP to hold talks about scheduling a new FIA inspection.

Ecclestone admitted there will be concerns until the race takes place.

"Until it's on there's always concerns obviously," Ecclestone told the Associated Press. "We have to get lucky and hope it will happen."

The inspection is now expected to take place in the week after the Japanese GP.

Indian driver Karun Chandhok completed a demo run of the circuit with a Red Bull car earlier this month.