Carlos Sainz was quickest and Charles Leclerc completed a Ferrari one-two Friday as championship leader Max Verstappen struggled in the second practice session for the Singapore Grand Prix.
Sainz was timed under lights at 1min 32.120sec, 0.018sec ahead of Leclerc, as Ferrari dominated in conditions expected to be most similar to those for qualifying on Saturday and for Sunday's night race.
"The car seemed to be in the right window from the very first lap, so we kept focused on fine tuning the set-up," said Sainz.
