Lewis Hamilton labelled his pole position in Canada "very, very special" but admits he and Mercedes will need to be wary of Kimi Raikkonen's Ferrari on Sunday.
Hamilton guided his number 44 Mercedes to the 44th pole position of his career, beating team-mate Nico Rosberg by three tenths. He admitted both his Q3 runs were disjointed but they were enough to secure the front spot on the grid.
"The first lap was pretty good, it could have been better," Hamilton said. "Then the next lap started off bad but then was good in the middle sector so there was good time in the car. I'm very, very happy with it. It was definitely tough out there with these tyres which are hard to switch on, hard for everyone.
Much of the focus was on Ferrari and its new engine upgrade but Sebastian Vettel dropped out of Q1 with an MGU-H issue. However, Kimi Raikkonen will line up behind the Mercedes pair in third and Hamilton says the team is unsure about what challenge will materialise on Sunday.
"Ferrari have picked up their pace this weekend. Fortunatly collectively as a team we've at least managed to maintain the pace we had or improve in some areas, which is good again. They had good race pace but I think they had maybe more deg than us, I don't know. Tomorrow is a bit of an unknown and it's not been the smoothest of weekends but we can build of the foundation Nico and I have achieved today and hopefully tomorrow we can bring the fight to them."
Speaking about his unique landmark in Montreal, he said: "I feel amazing today. It wasn't the easiest of days, FP3 was quite tough and I didn't really complete any laps, and mostly my fault, so I went into qualifying blind where the set-up would be. I won my first grand prix here in 2007 so to be back here and finally get another pole here, and for it to be the 44th, that's very, very special for me. Once again amazing job by the team by regrouping and pulling together to help keep me and Nico up here, to be on the front is a great job by them."