Races in calendar week 40/2021
All motorsport events on the weekend of 8–10 Oct 2021.
| Circuit | Country | Series |
|---|---|---|
| Barcelona |  Spain |
|
| Charlotte |  USA |
|
| Danville (Virginia Raceway) | USA |
|
| Istanbul |  Turkey |
|
| Most |  Czechia |
|
| Mugello |  Italy |
|
| Nürburgring (Nordschleife) |  Germany |
|
| Nürnberg (Norisring) | Germany |
|
| Rosario |  Argentina |
|
| Sugo |  Japan |
|