Renault development driver Oliver Rowland was quickest in the inaugural FIA Formula 2 practice session in Bahrain, ahead of Artem Markelov and Antonio Fuoco.
High track temperatures seemed to be the big issue that drivers were having to cope with, as they hit as high as 45 degrees centigrade. Johnny Cecotto was the early pace setter on his F2 return, before Rowland was able to go a few tenths quicker on his run.
GP3 champion Charles Leclerc initially went third quickest, before being beaten by his team mate in the closing stages of the session. Leclerc went for a fast lap in the dying moments of the session, but was blocked on his run and had to abort his lap.
McLaren junior Nyck De Vries went sixth fastest, even though he suffered from engine cut outs which eventually led to his session being cut short due to the intermittent problem.
When the chequered flag came out the top eight were within a second of each other, although the conditions are set to be cooler under the flood lights later in the evening for qualifying.