Di Grassi won pole position for the first race by recording the fastest lap in qualifying and held off Sarrazin to maintain the lead at the start and pulled away from the field.

Attention focused on Sébastien Buemi, demoted from second to twelfth for changing his battery, who sustained steering arm damage on the first lap but was able to move up the field during the course of the race.

Sarrazin ceded second to teammate Vergne who began to draw closer to di Grassi but his chase was neutralised when López crashed on lap 24, necessitating the safety car's deployment.

Di Grassi kept the lead at the restart and held off Vergne for the rest of the race to take his second victory of the season and the sixth of his career.

After Sarrazin spun at the first turn from contact with Daniel Abt and Nelson Piquet Jr., Buemi was hit from behind by António Félix da Costa, damaging his right-rear wheel guard which flailed in the wind before detaching.

[5] A maximum of 59 points were available for the final ePrix which meant di Grassi could still win the title if he won both races and Buemi placed second twice without taking two pole positions.

[6] After reducing Buemi's lead by 22 points in the preceding New York City ePrix, di Grassi stated his team had to improve vastly in finding hope of winning the championship in Montreal and felt more confident than before: "With the experience that I have with Formula E, you know that it can go from hell to heaven any weekend, any race.

"[7] Buemi, the pre-title favourite, missed the New York City races because of a World Endurance Championship commitment at the Nürburgring, but said he would prepare for the Montreal double header in the same way he would with any other event: "We will try to do the best possible.

"[10] In September 2014 Denis Coderre, the Mayor of Montreal, entered into advance talks with Jean Todt, the president of motorsport's governing body, the Fédération Internationale de l'Automobile (FIA) over holding a motor race in the city.

After flying to Miami to meet with Formula E holding's executive director in March 2015, Corderre said two months later that "informal agreements" had been reached with series promoters, allowing racing to be held in Montreal's streets.

[23] The track's surface caught several drivers off guard after locking their tyres, causing them to slide onto the run-off areas, and an oversteer affected multiple cars.

[34] After group qualifying ended, the lap times set by di Grassi, Buemi, Sarrazin, Rosenqvist and Prost progressed them to super pole.

[30][34] Sarrazin took third place by judging the first braking point correctly and demonstrated strong rear grip despite losing seven hundredths of a second through a driver error.

[33] Following the application of penalties, the rest of the grid lined up as Vergne, Evans, Carroll, Turvey, Dillmann, Duval, Abt, Buemi, Frijns, Heidfeld, Félix da Costa, López, Engel, Bird, Piquet and d'Ambrosio.

[36][39][43] The safety car was withdrawn at the end of lap 29,[36] and racing resumed as di Grassi used his FanBoost to pull clear from Vergne whom Sarrazin challenged.

[42] On the 31st lap,[44] Rosenqvist, who aimed for a podium position, struck the wall exiting the chicane,[39] damaging his left-rear suspension and bending his car's steering arm.

Di Grassi was delighted with his victory, calling it "the best day in my Formula E career" and reserved praise for his team after they used much of their energy to understand their lack of competitiveness at the preceding New York City double header.

He said he was hit from both sides at the race's start, causing him to lose positions, but spoke highly of his car and strategy allowed him to go faster than other drivers.

[43] After the race, the atmosphere in the pit lane became turbulent when a visibly angered Buemi went to Félix da Costa and accused him of breaking his car's steering in the second turn.

[48] More than half an hour after the rant, Buemi called Audi Sport Abt "a dirty team" through the press and claimed they violated series regulations.

[49] Frijns was perplexed by Buemi's confrontation as he expected to be thanked by him and believed he avoided being caught up in a more serious incident, "I had actually already taken him before I turned in and I felt a small touch on the left rear but nothing much.

[59] Rosenqvist was quickest in the fourth practice session with a 1-minute and 21.183 seconds lap; Buemi, López, Bird, Duval, Abt, Turvey, Vergne, di Grassi and Prost completed the top ten.

Dillmann and d'Ambrosio were third and fourth and Evans was the slowest competitor in the second group after heavily locking his tyres entering the first corner and had to regain control of his car to continue driving.

[56] At the end of group qualifying, the lap times set by Bird, Rosenqvist, Vergne, Heidfeld and di Grassi advanced them to super pole.

[68] He was joined on the grid's front row by Bird who appeared to go fastest by improving in the first sector but drifted in turn seven and voiced his disappointment over the radio.

[69] After the penalty was applied, the rest of the field lined up as Abt, Dillmann, Piquet, Sarrazin, d'Ambrosio, López, Duval, Buemi, Félix da Costa, Frijns, Turvey, Evans, Engel, Carroll and Prost.

[56] When the second race started at 16:00 local time,[37] Rosenqvist steered left to keep the lead ahead of the battling Bird and Vergne going into the first corner.

Although the loose bodywork piece came off, Buemi was shown a black flag with an orange disc, requiring him to enter the pit lane to mend car damage.

[71] Vergne had drawn close to race leader Rosenqvist and took advantage of him lifting and coasting to overtake him without trouble for first heading towards turn three on the 29th lap.

[84] While Buemi admitted to being disappointed over losing the championship, he congratulated di Grassi on his title win,[83] and stated him missing the New York City races was not an excuse in his defeat.