2003 Italian motorcycle Grand Prix
The 2003 Italian motorcycle Grand Prix was the fifth round of the 2003 MotoGP Championship. It took place on the weekend of 6–8 June 2003 at the Mugello Circuit.250 cc classification
125 cc classification
Below are the standings for the top five riders and constructors after round five has concluded.
;Riders' Championship standings
;Constructors' Championship standings
| Constructor | Points |
| 1 |  Honda | 125 |
| 2 |  Ducati | 65 |
| 3 | Yamaha | 57 |
| 4 | Aprilia | 30 |
| 5 |  / Proton Team KR | 21 |
- Note: Only the top five positions are included for both sets of standings.
Sete Gibernau
Alex Barros