Movistar Yamaha MotoGP riders Jorge Lorenzo and Valentino Rossi were both quick to find a very competitive pace.
Open class rider leads overall times on day one while Marquez tops second session
Aleix Espargaro topped the charts in free practice at Jerez today.
Andrea Dovizioso posted a lap of 1m41.042s, while Michele Pirro only 1m42.898s.
Marc Marquez posted a lap time of 1'39.313 to finish quickest in Friday practice at the Argentina Grand Prix.
Repsol Honda’s Marc Marquez was in menacing form in the first two practice sessions at Circuit of The Americas, the reigning world champion setting a lap time of 2'03.490 in FP2 to finish over a second quicker than his closest rival.
Andrea Dovizioso posted a lap of 2m04.495s, while Cal Crutchlow did it in 2m04.981s.
Jorge Lorenzo took seventh to secure a spot in tomorrow’s second qualifying session within the top ten riders.
Cal Crutchlow ends day in twelfth place after a crash.
Aleix Espargaro continued his impressive form from the Qatar pre-season test.
Open class rider improves on best time while factory teams continue to flounder
The newly named Movistar Yamaha MotoGP riders were out feeling their way on the night track for the first time this year.
At the end of the session, the two Ducati Team riders had recorded thirteenth and fourteenth quickest times.
First free practice session throws up a lot of surprises at the front
The riders of the Pramac Racing team after the hard work done in the three pre-season testing got back on the track for the first practice session of the year.
Spaniard routs first test of year topping the timesheets on all three days
Bradley Smith also enjoyed a magnificent start to the final round of 2013, the British rider storming to the fourth best time this morning.
Andrea Dovizioso and Nicky Hayden completed the first two free-practice sessions for the GP de la Comunitat Valenciana.
Yonny Hernandez still suffering from a fracture of the little finger on his right hand, injured during the recent overseas tripleheader.
Day 1 cancelled at Motegi
Andrea Iannone ended FP2 just 0.183 seconds away from Nicky Hayden and 0.038 seconds from Andrea Dovizioso, confirming the 11th place.
Jorge Lorenzo completed the first day of free practice as the fastest rider.
Despite the wind, Ducati drivers Nicky Hayden and Andrea Dovizioso posted their times of 1:30.609 and 1:30.754 respectively.
Jorge Lorenzo posted a lap of 1’28.961, while Marc Marquez set only a time of 1'29.255 at Phillip Island
Both Ducati Team riders hope to reduce their gaps to the leaders.