There was no backing off from rookie MotoGP title leader Marc Marquez during day one of the biggest weekend in his racing career.

The Repsol Honda star, who will take a 13-point lead over Jorge Lorenzo into Sunday's Valencia finale, led the way in both Friday practice sessions.

Marquez finished 0.066s ahead of team-mate Dani Pedrosa and 0.158s in front of Yamaha's Lorenzo, who had been second to Marquez in morning practice.

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"It was good to start the most important week of the season and with a good feeling," said Marquez. "We still need to improve our setup but we were fastest today - which is the key thing ahead of Sunday's race.

"It's difficult to say [what strategy to use] at the moment we will try and do 100% like a normal race and tomorrow we'll try in the same way. On Sunday we'll see the feeling but at the moment with the wind and the grip not being perfect the strategy will depend on tomorrow and what improvements are made.

"After FP2 everyone was quite close. I think that you need to push a MotoGP bike because otherwise the set-up and the tyres are not working. At the moment I'm pushing like always and focused on finding a good setup for the race.

"I hope to be close to Jorge and at the moment we are first but Jorge will improve because he will push a lot, and Dani too, but I hope to be close to them."

Marquez is bidding to become the first rookie champion since 1978 and the youngest in MotoGP history.