Nyck de Vries topped the morning session at the final day of Formula 2 testing at the Bahrain International Circuit, clocking in a 1:40.583, a time merely thousands of seconds ahead of Oliver Rowland in second.
Third saw Nobuharu Matsushita, followed by Nicolas Latifi is fourth and Formula 2 rookie Antonio Fuoco. The top five drivers were covered by just over three tenths.
2016 GP3 rivals Alex Albon and Charles Leclerc finished sixth and seventh respectively, while Norman Nato's fastest lap was good enough for eighth place.
Ninth was nato's teammate Sean Galael, and rounding out the top 10 was Artem Markelov. The final session of testing for Formula 2 will commence today.