F1 could follow Nascar's lead and hold races at night

He said an Asian night race would attract a bigger television audience as it would be shown in Europe during the day rather than in the early hours.

"It would be ideal for Asia, since it would be the right time difference to be broadcast in Europe," said F1's commercial rights holder.

"It would also be very spectacular, it all depends of course on the circuit."

Ecclestone also reiterated his long-held desire to extend the calendar from 17 to 20 Grands Prix.

He said he could "easily imagine" Mexico, India, Russia holding races, with South Korea "another candidate".

Team bosses have traditionally been relucant to have more than 17 races because of the extra expense and work involved.

But he said: "The more we hold races in good countries, the easier it will be for them to find sponsors."

Next year's French Grand Prix is in doubt because of poor access to the Magny-Cours track, weak attendances and insufficient accommodation.

Ecclestone said: "F1 is very international, it's a world championship, not a championship linked to certain countries. When the standards are not respected we have to go elsewhere."