Jorge Lorenzo was first in, first out at Jerez. He was the very first bike out of the pits at the start of FP1, and put in a final push in the end to take top spot. The Yamaha man knocked Avintia Ducati's Hector Barbera off the top spot, Barbera having alternated the lead with Valentino Rossi for much of the session. Rossi had led for much of the second half of practice, posting a string of fast laps, but was overtaken towards the end.
The two Repsol Hondas took fourth and fifth spots, Dani Pedrosa just edging his teammate Marc Marquez. Marquez debuted some new, larger winglets on the RC213V, bearing a remarkable resemblance to the items on the Yamaha. With Aprilia set to test winglets in the afternoon, and Suzuki slated to try them at the test on Monday, that will see every MotoGP bike using winglets.
The two Suzukis followed the two Repsol Hondas, Maverick Viñales heading up Aleix Espargaro. The good news for the Suzukis is that they were competitive, Viñales featuring in the top five throughout the session.