Sakhir Circuit dominate Friday practice ahead of Sunday 's Nico Rosberg . Lewis Hamilton and Lewis Hamilton finish top under floodlights at Sakhir Circuit . Reigning champion Sebastian Vettel finishes seventh fastest . Friday 's Bahrain GP will take place Sunday for first time .
Mercedes dominate Friday practice ahead of Sunday 's Bahrain GP . Lewis Hamilton and Nico Rosberg finish top under floodlights at Sakhir Circuit . Reigning champion Sebastian Vettel finishes seventh fastest . Sunday 's Bahrain GP will take place under floodlights for first time .