Races in calendar week 18/2003
All motorsport events on the weekend of 2–4 May 2003.
| Circuit | Country | Series |
|---|---|---|
| Barcelona |  Spain |
|
| Brands Hatch |  Great Britain |
|
| Croft | Great Britain |
|
| Fuji |  Japan |
|
| Nürburgring |  Germany |
|
| Oschersleben | Germany |
|
| Phoenix |  USA |
|