Races in calendar week 28/2003
All motorsport events on the weekend of 11–13 Jul 2003.
| Circuit | Country | Series |
|---|---|---|
| Fuji |  Japan |
|
| Le Mans (Bugatti) |  France |
|
| Mugello |  Italy |
|
| Narellan (Oran Park) |  Australia |
|
| Nürburgring |  Germany |
|
| Oulton Park |  Great Britain |
|
| Sao Paulo |  Brazil |
|
| Toronto |  Canada |
|