Antonio Felix da Costa topped the timesheets for DS Techeetah in an interrupted second practice session in Monaco.
The session was briefly stopped following Alexander Sims stopping on the run into Rascasse with an apparent mechanical issue with his Mahindra.
Oliver Askew also stopped on track in his Andretti at the second part of the Swimming Pool Chicane but was quickly pushed back behind the wall with only a brief yellow flag needed.
Behind da Costa, Mitch Evans was second quickest for Jaguar ahead of Envision Racing’s Robin Frijns.
Jean-Eric Vergne was fourth quickest in the other DS Techeetah, despite clattering the wall at the exit of the second part of the Swimming Pool Chicane at the end of the session and possibly damaging the suspension.
Maximillian Guenther was fifth fastest for Nissan ahead of Nyck de Vries in the Mercedes, and Pascal Wehrlein in the Porsche.
The top ten was rounded out by Andre Lotterer in the other Porsche, Edoardo Mortara in the Venturi, and Jake Dennis in the other Andretti.