The first-ever FIA Formula E Championship track running around the classic streets of Monaco was headed by e.dams pairing Nicolas Prost and Sebastien Buemi this morning.
The French driver, who won the Miami round in March, outpaced Buemi after setting his time in the final 10 minutes. Prost had a 0.115s advantage over his Swiss teammate.
The e.dams pair dominated the session and they had a second advantage over their opposition.
The first 45-minute practice session saw drivers exploring the shortened Monaco circuit, which turns right at Saint Devote and runs along the harbour front to a tight hairpin and then back along the classic Grand Prix circuit through to Tabac.
Behind Buemi in third position came the NEXTEV TCR entered Spark-Renault of Charles Pic, and then the Amlin Aguri of Antonio Felix Da Costa.
Rounding out the top five was the Dragon entered car of Jerome D’Ambrosio. The Belgian led much of the early stages of the 45-minutes session.
Winner last time out at Long Beach, Nelson Piquet Jr, was only 12th fastest this morning.
The notable incidents in the session were few, with some drivers locking brakes in to the new Saint Devote tight right at the end of the pit straight.
The chicane before Rascasse saw some action when a bollard was torn from its mountings at the apex.
The second practice session takes place at 10.30am local time.