"Although the Estoril circuit was given a security plan in time, it did not receive the desired authorisation to open the stands to Portuguese Superbike fans, which would happen in a limited number and in accordance with all the rules in force," the statement said.

The organisation explains that "the viewing of the world champions superbike and supersport 300 will thus be monitored exclusively through television transmission" and recalls that in the previous round of the championship, which took place in France on the first weekend of October, the winners received "the support, affection and applause of the public".

The award of the Superbike title will be decided in the Portuguese race between Scott Redding (Ducati) and Jonathan Rea (Kawasaki).

Rea arrives at the Portuguese race, which takes place between 16 and 18 October, with 59 points ahead of Redding, while there are still 62 in dispute.