Carlos Sainz put in a double shift at pre-season Formula 1 testing on Thursday, the Spaniard topping the times after covering twice the usual Bahrain grand prix race distance of 57 laps at the wheel of his new Williams. Sainz clocked 1min 29.348sec for the quickest lap on the middle day of three as the grid continued its preparations for the March 16 season-opener in Australia Lewis Hamilton, whose stunning move to Ferrari set in motion Sainz's arrival at the British team, looked in good shape again with the seven-time world champion only 0.031sec off the pace.