Bottas: Delaying new power unit a "small penalty"

Does this skyline look like Montreal to you

4 - Mercedes have been in pole position for four consecutive races in Canada, Hamilton with three and Nico Rosberg with one.

That emotionally charged weekend was capped off by a sixth win in Canada. It's a good one and it's still running perfectly and running reliably. Ferrari ought to know Montreal by now, seeing as how the city has hosted every Canadian Grand Prix for the last 40 years.

Certainly all the ingredients are in place for another thrilling Sunday afternoon as Hamilton, Ferrari's Sebastian Vettel and Ricciardo bring their battle to Montreal.

All teams are allowed to use a maximum of three power units during the course of the 21-race season.

It means then that opportunities await for all midfield teams and the unique demands could see a shake-up in the competitive order. The other occasions were 1987 and 1977.

Toto Wolff hoping Mercedes can outperform Ferrari and Red Bull in Canada.

The race will also see two other drivers chasing career milestones with Vettel looking to take his 50th career victory and McLaren's Fernando Alonso (Canada victor in 2006) celebrating his 300th race entered.

The delay, which also affects Mercedes customers Williams and Force India, would not affect performance in Montreal, the team said. "It's a circuit where overtaking is relatively straightforward, speeds are high and the cars are pushed to their limits".

"This is a power circuit and it definitely was our target and it definitely would have been helpful, but the guys worked as hard as they could and had to make a sensible decision not to bring it here, which is unfortunate but you try to make do without", Hamilton said Thursday.

The Twitter faux pas comes days before the 2018 Canadian Grand Prix, held on the Circuit Gilles Villeneuve in Montreal.

Vettel and teammate Kimi Raikkonen had been unable to challenge Hamilton in Melbourne qualifying, both finishing nearly seven-tenths of a second off the defending champion.

So far this year, all Mercedes-powered cars have used just one of each component this year, with the exception of Valtteri Bottas who has used two control electronics and energy stores following damage in an accident at the season-opening Australian Grand Prix.

Here are the highlights of last years race.