Races in calendar week 39/2021
All motorsport events on the weekend of 1–3 Oct 2021.
| Circuit | Country | Series |
|---|---|---|
| Hockenheim |  Germany |
|
| Lexington |  USA |
|
| Okayama |  Japan |
|
| Sachsenring | Germany |
|
| Sebring | USA |
|
| Singapore |  Singapore |
|
| Talladega (oval) | USA |
|
| Winton Raceway |  Australia |
|