Rob Smedley says the lap that Sebastian Vettel pulled out in qualifying for the Canadian Grand Prix was "monumental".

Vettel managed to outqualify both Williams cars - beating Valtteri Bottas by just 0.002s - despite having appeared well off the pace on his first run in Q3. While Smedley admitted that Williams was disappointed not to lock-out the second row he said he was impressed by what Vettel had produced to beat Bottas and Felipe Massa.

"We did a really good job preparing for this race," Smedley said. "We knew that it was going to be a race that would suit us. Obviously we've got a lot to do [in the race] but certainly over one timed lap we got everything together.

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"I think Sebastian did a monumental lap to be honest. If you look at where he was to where he suddenly appeared then hats off to the lad. He's done a great job to get his car in front of our two, but apart from that we were right there."

And Smedley urged Williams to look at the positives of being disappointed not to be starting Sunday's race ahead of both Red Bulls.

"I believe we could have taken third reasonably comfortably, but I'm sure that Sebastian would tell you that he's got two tenths [in hand] and Daniel Ricciardo would tell you a similar case. I think if you look at the actual theoretical best laps then Daniel is the third quickest car, Valtteri is the fourth quickest car, Felipe is the fifth quickest car and Sebastian is the sixth quickest car.

"So the two teams were there or thereabouts. It's nice to see Williams battling with the Red Bulls and being disappointed not to be in front. So I think it shows the ambition and the scale of where we've been and where we've come from. It's impressive."