World champion Marc Marquez saved his tyres during MotoGP's first session at Argentina's Termas de Rio Hondo circuit, then unleashed a devastating pace in FP2.

Just 14th and 2.3s behind leader Jorge Lorenzo in FP1, Marquez wheelied over the line at the conclusion of FP2 holding a one-second advantage over nearest rival and Repsol Honda team-mate Dani Pedrosa.

Marquez, running the hard rear tyre, was at his on-the-limit best on Friday, sliding his RCV in and out of corners, while slashing his way aggressively across the inside kerbs at turn ten.

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"It was a fun day, it is always interesting to learn all the different corners and their secrets at a new track and the practice sessions go by more quickly," said Marquez, winner of both rounds so far this year.

"This morning the track conditions were so difficult. Especially because the tyre grip dropped quite a lot. But we sacrificed putting in a fast lap in FP1, keeping the same tyre on during the entire session to save tyres for the rest of the weekend

"This afternoon in FP2 we were able to have a more normal practice and the track had improved a lot. The tyre durability also seemed much greater than before. I felt good and started to learn the lines.

"I am happy with how this first day went and with the base that we have. We shall continue working in the same way. We know the track is changing a lot, the lap times are getting better all the time and tomorrow will be much closer."