Fernando Alonso led the first practice session. The two Mercedes followed the Ferrari driver.

Fernando Alonso started the Canadian Grand Prix finishing as the fastest in the first free practice session held at the Gilles Villeneuve circuit. The Spanish was forward both Lewis Hamilton and Nico Rosberg, the two great masters of this season.
Despite the light rain that fell hours before the start of the session, the training conditions were dry. Kevin Magnussen was responsible for inaugurating the timesheets, mileage being the main priority of the Danish rookie, having never driven in this circuit before. Romain Grosjean was placed in second position when the track activity was intensifying.
Felipe Massa had the best time, but Lewis Hamilton was quick to beat the time of the Brazilian. The British led the rankings when Mercedes teammate Nico Rosberg kept a time just a few thousandths of him. Fernando Alonso moved up to reach the third position. Jean-Eric Vergne and Daniel Ricciardo completed the top 5.
After a long lull, Kvyat broke the silence of the session together with Magnussen. The ranking was led by both Mercedes drivers, with Rosberg ahead of Hamilton. Sebastian Vettel was placed third, just before Alonso snatched him the position. Hamilton beat Rosberg when there were 28 minutes to the end of the session.
Alonso was first, ahead of Hamilton on 16 mil. The Spanish would not give up the lead for the rest of the session and finished as the fastest. Hamilton was second, followed by Rosberg, Vettel and Bottas.
Results:
Pos. Car Driver Team Nation Laps Time Gap
1 14 Fernando Alonso Ferrari SPA 21 1:17.238
2 44 Nico Rosberg Mercedes GER 25 1:17.254 + 0.016
3 6 Lewis Hamilton Mercedes GBR 32 1:17.384 + 0.130
4 1 Sebastian Vettel Red Bull Racing – Renault GER 28 1:18.131 + 0.747
5 77 Valtteri Bottas Williams – Mercedes FIN 20 1:18.361 + 0.230
6 3 Daniel Ricciardo Red Bull Racing – Renault AUS 26 1:18.435 + 0.074
7 22 Jenson Button McLaren – Mercedes GBR 33 1:18.446 + 0.011
8 20 Kevin Magnussen R McLaren – Mercedes DAN 31 1:18.514 + 0.068
9 7 Kimi Räikkönen Ferrari FIN 15 1:18.578 + 0.064
10 25 Jean-Eric Vergne Toro Rosso – Renault FRA 14 1:18.643 + 0.065
11 27 Nico Hülkenberg Force India – Mercedes GER 30 1:18.733 + 0.090
12 11 Sergio Pérez Force India – Mercedes MEX 22 1:18.959 + 0.226
13 99 Adrian Sutil Sauber – Ferrari GER 24 1:19.108 + 0.149
14 8 Romain Grosjean Lotus – Renault FRA 32 1:19.142 + 0.034
15 26 Daniil Kvyat R Toro Rosso – Renault RUS 21 1:19.177 + 0.035
16 13 Pastor Maldonado Lotus – Renault VEN 37 1:19.34 + 0.163
17 19 Felipe Massa Williams – Mercedes BRA 7 1:19.575 + 0.235
18 21 Esteban Gutiérrez Sauber – Ferrari MEX 15 1:19.804 + 0.229
19 17 Jules Bianchi Marussia –  Ferrari FRA 15 1:20.2 + 0.396
20 4 Max Chilton Marussia –  Ferrari GBR 26 1:20.844 + 0.644
21 9 Marcus Ericsson R Caterham – Renault SWE 33 1:21.404 + 0.560
22 45 Alexander Rossi Caterham – Renault USA 27 1:21.757 + 0.353