Fourth round of Formula E championship brought a new winner this season: Lucas di Grassi.
Championship leader Sebastian Buemi did not have a successful visit to Mexico City: his only point came from his fastest lap and he was never in contention for a win, despite a strong showing in practice. On the other hand, di Grassi was never even close to the fastest drivers, even a Top10 result seemed out of the question. He started from 16th place, and his race seemed over when he was hit from behind by Mauro Engel in first corners. His team changed the wing during safety car period, and then he made an extremely early pit stop to change the car during next one – but that meant that when other drivers made their stops during green-flag running, he became the leader with 30 seconds lead. Late safety car period destroyed his lead, but as d'Ambrosio (who also made early pit stop and was in second place) held other contenders back, di Grassi managed to hold his lead while conserving battery power, while d'Ambrosio ran his battery down completely and had to concede second place to hard fighting Vergne and Bird. Formula E now heads to Europe (with Buemi leading the chapionship 5 points in front of di Grassi), with rounds in Monaco, Paris and Berlin (on new track on old Tempelhof airport) before returning across Atlantic for double-headers in New York and Montreal.