Races in calendar week 41/2021
All motorsport events on the weekend of 15–17 Oct 2021.
| Circuit | Country | Series |
|---|---|---|
| Donington Park |  Great Britain |
|
| Fort Worth (oval) |  USA |
|
| Indianapolis | USA |
|
| Motegi |  Japan |
|
| Pau-Arnos |  France |
|
| Pittsburgh | USA |
|