With each passing race the odds on Mercedes' rivals keeping them from another victory or halting their seemingly inevitable march to the championship titles grow ever longer.
Heading into round seven of the 2014 season the silver cars remain undefeated, with only Lewis Hamilton's engine failure in Australia keeping them from six consecutive one-two finishes.
Illustrating just how far ahead of their rivals Mercedes are, the shortest odds on any other driver claiming the title this year has risen as high as 41.00.
That's what's being offered on Daniel Ricciardo, Red Bull's newest recruit who currently holds fourth in the points standings. He's the only driver besides the two Mercedes pilots to have reached the podium more than once this year, doing so three times, though in Australia he was stripped of second place due to a technical infringement.
The closest driver to the Mercedes pair in the points standings is Ferrari's Fernando Alonso, who on 61 has exactly half that of championship leader Nico Rosberg. He's priced at 81.00 to take the title. Reigning champion Sebastian Vettel, who's been plagued by technical problems in the early races, is on 56.00.
Their chance of keeping Hamilton or Rosberg from getting their hands on the silverware is fading fast. For Red Bull and Ferrari, this weekend will provide a major test of whether they can close the gap between them and the all-conquering W05s.
Canada is the first of two races at venues where engine power is all-important. Both the Circuit Gilles Villeneuve, scene of this weekend's race, and the Red Bull Ring in Austria (formerly the A1-Ring), feature several long straights which tip the balance in favour of engine performance. And here both Ferrari and Renault, Red Bull's engine supplier, are bringing major updates for their power units.
Don't expect these upgrades to immediately close up the front of the field. After all, Mercedes are constantly making progress as well. But the key to how long they can stay in front for will be how quickly Ferrari and Red Bull can get within striking distance - at the moment they aren't even that close.
In Canada they are likely to be competing for 'best of the rest'. Ricciardo has the shortest odds to make it to the podium at just 1.80. But the Mercedes-powered customer teams Williams, Force India and McLaren are all worth considering. So is Sergio Perez, priced at 22.00, who was on the podium at this race two years ago and also did so in Bahrain, on a track which shares some characteristics with this one.
In the meantime the biggest threat to Mercedes sweeping to victory in all 19 races this year could be the growing enmity between its two drivers.
There were glimpses of this in Bahrain and Spain, where they pushed each other hard for victory. But things came to a head in Monaco, where Hamilton raised suspicions about whether Rosberg had intentionally stopped his car during qualifying in a manner which ensured Hamilton would be unable to improve his time.
Whether he did or not, Rosberg's pace around Monaco was a warning to Hamilton that he may not have everything his way in the battle for this year's championship.
But if he were to beat Hamilton in Canada it would be a major upset, as this has always been one of Hamilton's strongest venues.
He already has three wins at the track, and on odds of 1.55 he is the favourite to do so again on Sunday. Are you brave enough to bet against him?
Keith Collantine is the editor of Formula One blog F1 Fanatic.