Oliver Rowland topped the second and final practice session in Monaco, becoming one of three drivers to set a lap time below the 50-second mark.
The Brit set a 49.847 around the shortest lap on the calendar over a tenth clear of the two Techeetahs of Jean-Eric Vergne and Andre Lotterer.
Alex Lynn set the fourth quickest time just 0.009 quicker than fastest man in FP1 Lucas Di Grassi. Pascal Wehrlein ended sixth ahead of Alex Sims and Felipe Massa while Daniel Abt and Sam Bird completed the top ten.
Jerome D’Ambrosio ended eleventh ahead of Antonio Felix da Costa and Stoffel Vandoorne, Edoardo Mortara was 14th with Jose Maria Lopez in 15th.
Gary Paffett ended 16th, however Oliver Turvey in 17th set the exact same time as his compatriot.
Maxi Gunther ended in 18th ahead of Championship leader Robin Frijns. The Dutchmen was caught out by traffic on his hot lap which caused him to be further down the order.
Tom Dillmann finished 20th ahead of Sebastien Buemi and Mitch Evans, who failed to set a lap time on 250kw.