"The track will be built on schedule," Tilke said.
Aug.8 (GMM) Hermann Tilke insists he is "100 per cent certain" the circuit in Sochi will be ready for next year's inaugural Russian Grand Prix.
Big doubts hang over the 2014 race on the Black Sea coast, after a dispute between the promoter Omega and the Russian automobile federation resulted in Russia missing the deadline to apply to be on next year's calendar.
Earlier, there were also reports of construction delays, while German Tilke, whose company is responsible for the design of new F1 circuits, expressed concerns about the quality of the local construction contractors.
"Nothing else is in my area of responsibility," he said.
"The track will be built on schedule," Tilke added, insisting that even the construction delay between November and the end of the 2014 games in February will not pose a problem.
"No, everything will be ok," he said. "The track will be ready on time."
Tilke also insisted he is no longer worried about the quality of the construction work. "All of these problems were long ago. Everything is now solved," he said.