An already cool morning turned wet just before the start of the first practice session for the premier class, but despite the unexpected rainfall, riders were eager to head out and test the conditions. And they definitely did that, Iker Lecuona topping the first session on home soil by a tenth of a second after a hairy moment at turn 13. Jack Miller also spent a couple of minutes in the limelight but crashed on the wet paint at turn 1 right after taking top spot and soon got demoted to second. KTM made a much better start than one week ago, Miguel Oliveira joining Lecuona in the top three late on and pushing Johann Zarco to fourth, with Joan Mir completing the top five.
Pecco Bagnaia spent the most time at the top of the timing screens but a gentle slip at turn 2 hindered his progress and dropped him to 6th, ahead of Luca Marini, who also followed his example at turn 6. Franco Mobidelli in 8th place was the lead Yamaha, with Pol Espargaro one tenth back as the lead Honda rider. Takaaki Nakagami rounded out a top 10 covered by nine tenths of a second but with Alex Rins and Jorge Martin in close proximity.
All eyes were on Fabio Quartararo throughout the session, but it was mostly due to the new shoulder camera he was showing off, rather than his 15th place on the timesheets. Not everyone was as enchanted with the conditions, Danilo Petrucci crashing early on at turn 4, without rejoining the action, and Valentino Rossi briefly checking out the conditions but not tempted by a hot lap.