Races in calendar week 31/2021
All motorsport events on the weekend of 6–8 Aug 2021.
| Circuit | Country | Series |
|---|---|---|
| Curitiba |  Brazil |
|
| Elkhart Lake (Road America) |  USA |
|
| Ipswich (Queensland) |  Australia |
|
| Nashville | USA |
|
| Nürburgring |  Germany |
|
| Snetterton |  Great Britain |
|
| Watkins Glen | USA |
|
| Zolder |  Belgium |
|