#F1Testing Grosjean knocks half a second off his best to stop the clocks in 1:18.59 Sirotkin improves his best time of the day with a 1:20.250 to move above the Sauber of Charles Leclerc. The Russian has switched onto the soft tyres now, but he is still six tenths off Williams’ best time of testing which was set by Robert Kubica yesterday.