A quick downpour after the end of the Moto3 session soaked the track and promised to cause trouble for the MotoGP class. With sunshine already breaking through the clouds by the time the first riders joined the track, it was a matter of how quick the new surface would dry.
Wet tyres were the only conceivable choice in the beginning of the session but, perhaps unpredictably, Dani Pedrosa was the first leader of the afternoon, consistently increasing the gap at the front as anyone looked to challenge him. And by "anyone" I mostly meant teammate Marc Marquez and, like in the good old days, Jorge Lorenzo. The reigning world champion eventually led the way, getting in front of his teammate by one tenth of a second, while Lorenzo slipped back into a more usual tenth position.
Just as some teams started questioning tyre choices, another downpour hit the track and, while it clarified viable options, it also discouraged much track action. The factory Hondas were joined by Johann Zarco and Scott Redding for a less than romantic mid-session stroll through the rain. Zarco drew the short straw and was the first victim of the conditions, the Frenchman crashing out just as a few more riders were encouraged to go out by Pedrosa’s pace, the likes of Rossi, Dovizioso and Viñales swimming along.
The final ten minutes saw all riders out on a drying track, Petrucci the first rider to make the most of the conditions and take over the lead, but red sectors were coming in fast and furious. Hector Barbera, Aleix Espargaro, Andrea Dovizioso then Marquez once again saw their name at the top of the timesheets.
The world champion was determined to claim his land, several fastest laps putting him ahead by two tenths of a second, only to be pipped on the final lap by Barbera, who put his Ducati on top as the checkered flag waved.
Marquez settled for second, with Pedrosa climbing back into third, with the exact same time as Petrucci. The elder Espargaro brother finished fifth, with Cal Crutchlow in sixth and the final rider within half a second of the leader. Dovizioso fell back to seventh, followed by Jonas Folger and an impressive Sam Lowes grabbing ninth place in changing conditions.
While fast in the wet, Valentino Rossi could not improve much once the track dried, the Italian down in fifteenth position. Still, he was five places ahead of his teammate, Maverick Viñales twentieth and almost two seconds down after a late pitspot for some minor adjustments.