After the Belgian Grand Prix on 1 September, all teams (except Arrows) conducted mid-season testing at the Autodromo Nazionale di Monza between 3–6 September to prepare for the upcoming race at the circuit. Michael Schumacher was fastest on the first day, ahead of BAR test driver Anthony Davidson which was held in wet weather conditions, with intermittent dry spells. Ralf Schumacher set the fastest times on the second where the rain continued into the morning before stopping meaning the track dried up as the session progressed. The first full day of dry weather conditions was held on the third day where Pedro de la Rosa was the fastest driver. Rubens Barrichello was the fastest driver on the final day of testing. Juan Pablo Montoya caused a red flag to be shown when he lost control of his car at the Lesmo corners, and removed his front wing after colliding with the barrier.