Imola is undergoing a much-needed revamp

The International Automobile Federation (FIA) said its world motor sport council had confirmed a 17-race calendar after meeting in Barcelona.

The FIA said: "No agreement was in place for an 18th race and there will continue to be 17 races in 2007."

Imola, Ferrari's home circuit, is currently undergoing redevelopment.

It had hoped to win a reprieve after teams agreed unanimously last month to an 18th race.

But an FIA spokesman said there was still no commercial agreement in place between the circuit and F1 supremo Bernie Ecclestone.

However, the updated calendar, issued ahead of Sunday's season-ending Brazilian GP, is not necessarily definitive.

There is a break between the Bahrain GP on 15 April and the Spanish GP on 13 May that could accommodate Imola.

The FIA confirmed that the European GP would be dropped and Germany's round shared by the Nurburgring and Hockenheim in future.

The Nurburgring will host next year's race on 22 July.

It also switched around the Chinese and Japanese races, pending approval of the national sporting bodies.

Japan will host a race at Fuji on 30 Sept before the penultimate round of the season in Shanghai on 7 October.

Provisional 2007 Formula One calendar: