Nick Cassidy blew a chance to massively extend his Formula E World Championship advantage by spinning out of the Portland lead on the penultimate lap.

Though his Jaguar team-mate Mitch Evans crossed the line first, a five-second penalty for contact with McLaren’s Jake Hughes dropped Evans to eighth and meant Antonio Felix da Costa picked up a third win in four races.

But Porsche had cause for disappointment too because da Costa’s title-chasing team-mate Pascal Wehrlein gained just one point on Cassidy as he only managed to finish 10th.

Cassidy appeared to be driving another energy-saving masterclass - hanging back in 13th early on then surging from there to first within a couple of laps before half-distance.

He won a lead fight with da Costa and was keeping Evans at bay on the road when he ran wide into the Turn 10/11 chicane at the end of the lap on the penultimate tour, slewing onto the grass and spinning down to an eventual 19th.