Ricciardo's first win in F1 was in Montreal in 2014.
That means the Briton, his teammate Valtteri Bottas as well as both customer teams, Force India and Williams, will be using the same engine that has done the first six races which means it has lost peak power and is potentially getting close to the end of their cycle, meaning failures are more likely. "So all Mercedes-powered cars will be running PU1 for this weekend, too, before receiving new units in France".
The Brackley-based outfit had originally planned to bring the second of the three allocated engines each of Formula 1's 10 teams is provided with across the 21-race season.
"It's certainly a different circuit, quite similar to Melbourne in a way, as it's a mix of a street and a permanent track", says Carlos Sainz Jr.
Hamilton has a superb record in Montreal and victory on Sunday would see him match Michael Schumacher's haul of seven wins at the Circuit Gilles Villeneuve.
Ferrari's Kimi Raikkonen was 0.13 seconds slower, followed by Verstappen's Red Bull teammate and Monaco victor Daniel Ricciardo.
It's a defeat that sticks in the craw of Mercedes and team principal Wolff, who is determined the champion team will not repeat the same error again.
Then there's the four-hour epic in 2011 as, in wet/dry conditions, Button recovered from last place at one stage early on to pass Vettel's Red Bull on the last lap for the win.
"There's some tricks to the track, but it's a great track, there's a lot of over taking possibilities, so it is a good show."
Canadian Lance Stroll, in the other Williams, caught the Wall of Champions in the morning and punctured a tire.
Meanwhile, rivals Ferrari, Renault and Honda are all due to bring updates to their power units this weekend and rival drivers from Ferrari and Red Bull are expected to start the race with fresh engines. He is hoping to build on last year's appearance at his hometown track, when as a rookie he earned the first points of his Formula One career.
That is your look ahead to the possible stories to follow this weekend in Canada.
"They'll be hard to beat", the Australian said.
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