CLICK HERE for the full FR3.5 FP1 results from Aragon
Matthieu Vaxiviere set the pace during the first free practice session of the 2015 Formula Renault 3.5 Championship season at Motorland Aragon.
The Frenchman, who is entering his second FR3.5 campaign with the Lotus team having missed a portion of the 2014 season with a back injury, emerged top in a closely fought session that would see just three tenths cover the top eight.
One of several rookies to be making their debut this year, Swede Gustav Malja was second fastest for Strakka Racing, ahead of AVF's Beitske Visser, Draco's Pietro Fantin and defending Eurocup 2.0 champion Nyck de Vries.
Elsewhere, Manor F1 driver Roberto Merhi caused a red flag when he stopped at turn one in the latter half of the session, the Spaniard being bumped down to 11th as a result, just behind Red Bull Junior Dean Stoneman in tenth.
This weekend's curtain raiser will see just 10 teams and 20 drivers competing following the late withdrawals of Zeta Corse and Comtec.