Lewis Hamilton has accused Ferrari of having "no rules" after a clash with his team-mate Charles Leclerc during the Italian Grand Prix.

Hamilton launched an aggressive move up the inside of his team-mate at the first corner, but was then forced off onto the gravel himself on the exit of the chicane as Leclerc held onto the inside line. Hamilton dropped from fourth to 10th, finishing sixth.

Leclerc held onto third after the incident, which featured contact between the pair, but then crashed out on the second lap, leaving Ferrari to suffer a dismal afternoon at their home race.

"I think it comes down to rules of engagement," said Hamilton, who joined Ferrari from Mercedes in 2025. "When I was at Mercedes, we had written rules of engagement. Here, there are no rules. We need to address that."

Championship leader Kimi Antonelli claimed victory from 19th to extend his advantage over Hamilton to 76 points, while Ferrari team principal Fred Vasseur insisted it was too early in the season to prioritise one driver.