Factory Ducati rider Marc Marquez topped the timesheets in the first MotoGP practice session at the Autodromo Termas de Rio Hondo.
The Spaniard produced a fantastic lap time of 1.38.937s with five minutes to go, continuing from his dominant season opening performance in Thailand.
Rain fell onto the circuit overnight, resulting in lap times hitting the optimal level expected, with the track surface extremely dirty on all parts of the track.
Regardless of the potential damp patches on the track, riders complied as many laps as possible to understand bike performance.
Johann Zarco finished the session in second aboard the LCR Honda, despite previously impressing as the table-topper in the early parts of the session.
Gresini rider Alex Marquez continued his fine display at the season opener to finish the session in third, but was over fourth tenths behind the top two.
Ducatis dominance continued thanks to Franco Morbidelli posting a time to place him in fourth spot.
2023 Argentine Grand Prix winner Marco Bezzecchi led the classification charts for a small stint during the session, finishing fifth overall and as the lead Aprilia.
Luca Marini posted a strong sixth place for Honda, further solidifying the progress the Japanese marque has made over the winter period.
Jack Miller posted Yamahas best result to finish seventh for Pramac Yamaha, pipping lead KTM rider Maverick Vinales and the second HRC rider of Joan Mir.
The factory KTM duo of Pedro Acosta and Brad Binder finished in tenth and 11th, respectively, separated by under 0.020s.
The factory Yamaha duo of Alex Rins and Fabio Quartararo produced 12th and 13th for their first practice session, placing themselves right in the middle of the pack.
Fabio Di Giannantonio completed his session ten places off his teammate in a lonely 14th, finishing ahead of rookie sensation Ai Ogura.
The second factory Ducati rider, Francesco Bagnaia could only muster 16th, finishing 1.351s off the pace of his table topping teammate Marquez.
Fermin Aldeguer ended his session in 17th in his second MotoGP race weekend, lapping quicker than Miguel Oliveira and fellow rookie Somkiat Chantra.
Trackhouse rider Raul Fernandez established 20th position, defeating the struggling Enea Bastianini who closed out proceedings as the last placed full-time rider.
Lorenzo Savadori finished in dead last and over a second adrift, standing in for defending MotoGP champion Jorge Martin.
