Races in calendar week 44/2003
All motorsport events on the weekend of 31 Oct–2 Nov 2003.
| Circuit | Country | Series |
|---|---|---|
| Albacete |  Spain |
|
| Cagliari |  Italy |
|
| Daytona |  USA |
|
| Fontana (oval) | USA |
|
| Suzuka |  Japan |
|