Formula 1 pre-season testing continued in Bahrain as Mercedes and Valtteri Bottas made up for lost time by returning to the top of the timesheet.
Red Bull again racked-up mileage ahead of the new season, despite Sergio Perez's engine cover spectacularly disintegrating down the start-finish straight at the Bahrain International Circuit in the afternoon.
Aston Martin recovered from a gearbox issue that reduced Sebastian Vettel's time in the car to just 10 laps to go third quickest with Lance Stroll, whilst Fernando Alonso marked his return to F1 with a metronomic performance for Alpine.