Lewis Hamilton currently tops the drivers' standings ©Getty Images

Three more European Grands Prix have been added to this year's Formula One schedule, although a trio in the Americas have also been cancelled.

It means the total number of races on the calendar now stands at 13, with three of these already staged.

All are in Europe.

The first of the new races will be at Germany's icon Nürburgring on October 11, marking the first time since 2013 that the circuit has staged a Formula One race.

Portugal's Portimão will be next, with the Algarve International Circuit due to host its first-ever Formula One race on October 25.

The famous Imola track in Italy is then to host what is currently set to be the final Grand Prix of the season on November 1, although organisers have expressed a desire to add more races.

Imola hasn't hosted a Formula One race since for 14 years ©Getty Images
Imola hasn't hosted a Formula One race since for 14 years ©Getty Images

Legendary Brazilian driver Ayrton Senna died in an accident during the 1994 Grand Prix at Imola, and it hasn't been the on the Formula One circuit since 2006.

Britain's Lewis Hamilton currently leads the drivers' standings after three races, with his Mercedes team having won each Grand Prix so far.

Due to travel restrictions, the Formula One calendar still does not feature any races outside of Europe.

Events in Mexico, Brazil and the United States have now been officially called off, with COVID-19 transmission rates high in all three countries.

Fourteen races have now been cancelled in all.

Formula One has also announced that, in its latest round of coronavirus testing on drivers and team personnel, all 1,461 tests came back negative.