 Complete the following phrase:  A provisional seven-round calendar was announced on 26 September 2020, with the option to add another round at Hockenheimring. A plan to resurrect the Pau Grand Prix after it was cancelled in 2020 due to the COVID-19 pandemic did not come to fruition. The calendar was then further concretized on 3 December 2020, adding an event in Imola and leaving a ninth event to be announced. On 9 March 2021, the Portimão round shifted one week later, and it would be the official support round of the 