A power cut halted Formula One's pre-season testing in Bahrain on Wednesday with Ferrari's Charles Leclerc top of the afternoon timesheets after Mercedes rookie Andrea Kimi Antonelli set the morning pace.

McLaren's Lando Norris set the fastest time on the opening day of Formula 1's preseason test in Bahrain, which was extended by an hour due to a power cut at the circuit in the afternoon session.

McLaren's Lando Norris topped the times in Formula One pre-season testing on Wednesday, the first of three days in Bahrain punctured by a power outage that left the pitlane and circuit in darkness. But even so on the evidence of day one's testing the 75th anniversary season could be one to remember with less than one second covering the top seven drivers.