Nico Muller upstaged the GP3 championship contenders to top the first free practice session of the weekend at Monza.
Five drivers have a mathematical shot at the title this weekend, although realistically the showdown is between ART teammates Valtteri Bottas and James Calado. But nobody could do anything about Muller (Jenzer) once the Swiss driver moved to the top with six minutes remaining in practice, and went quicker still with his next flying lap.
Title outsider Adrian Quaife-Hobbs (Manor) was a factor throughout the 30 minutes, and he engaged in a scrap for second with points leader Bottas during the last five minutes. In the end, the ART driver could not respond to the Briton's pace, but more importantly for Bottas he was just ahead of Calado.
Bottas' session was not without incident though, as he took a hard hit over the curbs at the first chicane which sent his car into the air. Rookie teammate Richie Stanaway did the same a lap later, but at higher speed.
Behind the top two in the standings, Tech 1's Aaro Vainio put in an impressive penultimate lap to gatecrash the top five just ahead of MW Arden driver Lewis Williamson.
Of the other two drivers in mathematical title contention, Alexander Sims (Status) was 16th and Mucke's Nigel Melker, who is the closest challenger to the ART pairing at the top, was only 18th.