McLaren duo Jenson Button and Kevin Magnussen believe that tyres will be the crucial factor during Sunday's Canadian Grand Prix.
Button was eighth quickest in qualifying at the Circuit Gilles Villeneuve and is hoping that predicted hot temperatures will play into McLaren's hands.
"It’s going to be such a difficult afternoon for everyone which is great, we’re not in a position that we’re happy with so hot temperatures could mix it up, maybe starting outside the top 10 is a good thing, maybe it’s not," he said.
"The tyre you start on, whether you start on new tyres, one stop, two stop, three stops, there’s so many different scenarios and it’s good for Formula 1 as it should be a good race. We just have to make sure we’re the ones to make the right call."
Kevin Magnussen was just a tenth slower than Button in Q2 but the close nature of the field means he'll start the race from 12th on the grid.
"The car actually feels good – there’s not much I’d do to change the set-up – but the car’s lack of downforce means that we’re not quick enough," he said.
"Good straight line speed will be very important, tyre degradation will be important. It’ll be very hot tomorrow," he added.