Jorge Lorenzo doesn't believe his performance in FP2 is a reflection of his 'real position' after the Movistar Yamaha rider finished the day in ninth place at the Argentina MotoGP.

Making his debut at the Termas de Rio Hondo circuit, Lorenzo had set the early pace in the morning to lead the times, but the double premier class world champion tumbled down the leaderboard in the afternoon, ending FP2 2.220s behind Marc Marquez.

The Yamaha star dropped down the time sheets in the afternoon after staying out on a worn tyre at the end of the session.

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"Like everyone, we are having problems with the rear tyres. After four or five laps the performance drops so much," said Lorenzo. "The tarmac is so aggressive. Maybe it is the machines they are using to clean the track.

"The lap time difference between a new tyre and an old tyre is four or five seconds. In the morning I was the last one to put a new tyre in so I had a better grip at the end of the practice, that's why I was first.

"In the afternoon I was the opposite: I stayed with the old tyre at the end of the session when everyone had a new one; that's why our position was not so good," he added. "I think our real position is in the top five today.

"The layout of the track is wonderful. I love it. It's just the tarmac with these tyres that is very difficult to manage."

Lorenzo's quickest lap of 1m 41.533s left him 0.138s behind team-mate Valentino Rossi.

NGM Forward Racing's Aleix Espargaro was the top Yamaha rider, finishing third and 1.253s behind the Repsol Honda of championship leader Marquez.