mercedes duo lewis hamilton and nico rosberg found themselves in unusual positions towards .
but there was no alarm as mercedes focused on a particular plan , with the 90-minute session at the bahrain international circuit hardly representative of what all the drivers will face in qualifying and the race .
at the start of fp1 , and with the track exceptionally dusty - a situation which will naturally improve over the weekend with use - the circuit and air temperatures were a searing 52 and 36 degrees centigrade respectively .
ferrari racing driver kimi raikkonen finished first in friday 's practice session for the bahrain grand prix .