Mortara was in early contention for victory at the Autodromo Hermanos Rodriguez, but dropped down to fifth by the race's end after the majority of the field was forced into energy conservation mode by the leading Porsche duo of Pascal Wehrlein and Andre Lotterer.
However, the Swiss driver managed to extend his points lead over reigning champion Nyck de Vries having finished just under a second up the road, and has 43 points to de Vries' 38.
