Bernie Ecclestone has hit out at European countries that do not spend more to safeguard their future on the Formula 1 calendar.
The F1 supremo was asked by Top Gear which recently lost races he most regrets, and answered: "Two races we've lost which I'm genuinely upset about were India and Turkey."
However, the sport has also lost France, Monza's race was in doubt for months and the future of the German Grand Prix is uncertain.
"It's the same as in England," Ecclestone insisted. "Silverstone is not, I'd say, super-safe - quite the opposite. These circuits don't need a lot of money to make them safe.
"It's disappointing to think that all these countries spend a lot of money trying to get the Olympics... and nobody makes any money out of. Yet, for the small amount of money they could [spend on] a Formula 1 race, they don't want to do it."
Ecclestone admitted that another concern is the competitive situation in F1, with Mercedes dominating and Toto Wolff having refused to supply an engine to Red Bull.
Told that his relationship with the Mercedes team boss is strained, the 85-year-old denied it, and also played down reports that Wolff is shaping up to oust him.
"I'm very happy for him to try. Or anybody else," said Ecclestone.
The 2016 championship continues on Sunday with the Singapore Grand Prix.
