The Ferrari junior driver topped the time sheets with a 1:17.746 ahead of Mclaren’s Stoffel Vandoorne who had topped the morning session.
Vandoorne was 0.088 seconds off Leclerc whilst using the ultrasoft compared to the soft for Leclerc.
Vandoorne had spent most of the afternoon in the garage as a mechanical failure hit his MCL32.
Bottas who was completing 2018 tyre testing for Pirelli ended the day in third and was the most productive having done 155 laps.
In his first F1 test GP3 driver George Russell came forthwith 100 laps under his belt.
Lance Stroll, stepping in for Felipe Massa, was next with 137 laps followed by the Force India of Nikita Mazepin.
Lucas Auer drove the Force India in the afternoon session, sandwiching the Renault of Nicholas Latifi and Toro Rosso’s Sean Gelael with Mazepin.
Rounding out the time sheets were the Haas of Santino Ferrucci, Max Verstappen and the Sauber of Gustav Malja who was 3.7 seconds off of Leclerc.
Final standings are as follows