Event organisers of the Turkish Grand Prix are concerned Bernie Ecclestone will not sign a new deal after 2011.

According to a report, F1 supremo Ecclestone has given the track's original builder and financier notice that he plans to take the race off the F1 calendar in three years' time.

Istanbul Park's general director Can Guclu admits there are major concerns over the future of the Turkish GP.

"We are afraid that 2011 may be the last year of the staging of F1 in Istanbul," he told Today's Zaman newspaper.

"There is serious competition from such countries as South Africa, Russia, Bulgaria and South Korea. South Korea has a highly developed economy and they place importance on sporting events.

"The [football] world cup was held in there in 2002. And Russia has already started constructing a race course."

Guclu says negotiations about an extension to their current deal with Ecclestone are yet to get underway.

"If we want the Turkish Grand Prix to stay on the calendar, we need to start working immediately," he added.

"Or else, we cannot just begin negotiating for the race in the last year of the contract.

"We made a deal with Ecclestone in 2003 and the first race was organised in 2005. As you see, there is a four-year process in order to be included in the calendar.

"There is still nothing about extending the deal and no demand from either side."