Jean-Eric Vergne set the pace for DS Techeetah in an eventful second practice session in Rome.
Antonio Felix da Costa was second quickest for BMW i Andretti Motorsport after a late flurry of 250kw laps and was followed by Sebastien Buemi and Oliver Rowland in the pair of Nissan e.dams entries.
Mitch Evans was fifth fastest for Jaguar ahead of Andre Lotterer in the second of the DS Techeetah entries and Sam Bird was seventh for Envision Virgin Racing.
Alex Sims was eighth in the other BMW with Daniel Abt ninth quickest for Audi Sport Abt Schaeffler and Jerome d’Ambrosio rounded out the top ten for Mahindra.
Edoardo Mortara was 11th for Venturi ahead of the Venturi-powered HWA entry for Stoffel Vandoorne while the returning Maximillian Guenther for Dragon Racing was 13th.
Robin Frijns was 14th for the second of the Envision Virgin Racing entries ahead of NIOs Tom Dillmann and Gary Paffett in the second of the HWAs.
Oliver Turvey was 17th for NIO ahead of Felipe Massa, who caused an FCY after he had locked up and spun heading into Turn 13 with Venturi boss Susie Wolff saying that it might have been a driveshaft failure for the Brazilian driver.
Pascal Wehrlein was 19th for Mahindra ahead of Lucas di Grassi, who at one stage was dragging a large piece of advertising hoarding before later in the session, spinning at Turn 13 and bringing the yellow flags out with Alex Lynn 21st for Jaguar.
Jose Maria Lopez rounded out the field as he crashed in the early part of the session and went straight on at Turn 16, damaging the front aero and the right front suspension although he was able to get back to the pits.
He had locked up early on in the braking zone and tried to lift off the brakes but had barely slowed by the time he hit the wall.