Honda rider Marc Marquez dominated the third MotoGP practice session at Argentina's Termas de Rio Hondo circuit, as both works Ducati riders missed out on automatic Q2 spots.
A wet-weather session left championship leader Andrea Dovizioso and team-mate Jorge Lorenzo - as well as Pramac rider Danilo Petrucci, also riding a 2018-specification Ducati - outside of the combined practice top 10, after the Italian marque's bikes struggled on Friday.
Rain overnight followed by overcast conditions in the morning meant the track surface did not dry in time for third practice, and riders were forced to wet-tyre test.
Marquez seized the top spot in the opening minutes, but was soon surpassed by Dovizioso, before Tech3 duo Hafizh Syahrin and Johann Zarco also took turns at the front.
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