The list of current Formula 1 races facing uncertain futures continues to grow with the iconic venues that host the Belgian and Japanese GP's the latest to join.
RaceFans reports organisers of the events held at Spa-Francorchamps and Suzuka will need to sign new deals with commercial rights holder Liberty Media to remain on the schedule on the calendar in 2019.
This comes as the Italian, German, British Grands Prix are known to under threat with Brazil and now Spain also having question marks placed on their futures, although Barcelona chiefs have played that down.
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Monza, Silverstone, Hockenheim, the Nurburgring and Interlagos are all in talks over their respective future placements on the schedule which, with the return of France this year, is equal to the record of 21 races in a single year.
F1's commercial director Sean Bratches is also eyeing an expansion with a return to Holland and Argentina, a second US race possibly in Miami and a new race in Vietnam all believed to be strong candidates.
