The Swiss driver collected his third victory of the season in a tentative Morocco encounter, where hot conditions ensured that teams were seeking to stave off the threat of overheating batteries - and thus precipitated an uncharacteristically early trade of attack modes among the front-runners.
Mortara had preserved his second place on the grid off the line, having a fleeting look at the inside of da Costa at the start before the DS Techeetah driver closed him off.
