Carlos Sainz Jr feels the Canadian Grand Prix will be Toro Rosso's hardest race of the 2015 Formula 1 season.
Sainz starts 11th at the Circuit Gilles Villeneuve in Montreal, but with the Renault engine in his Toro Rosso lacking performance, he is fully expecting the race to be "very tricky".
"We obviously have a power deficit that makes it very difficult to overtake and very easy to be overtaken here," said Sainz.
"Also with the lack of downforce we are running on the car it is not ideal for tyre degradation, so I expect the toughest race of the season.
"Everything says points will be more difficult than ever, but we're going to fight for it.
We're going to try something clever, something different, and let's see what we can do."
VERSTAPPEN COUNTING ON SAFETY CAR
Team-mate Max Verstappen starts at the back of the grid due to his cumulation of penalties.
Verstappen went into qualifying knowing he faced a drop of 15 places, taking a five-position hit for being at fault for a crash with Romain Grosjean in the Monaco Grand Prix, and the further 10 for taking a fifth engine for this season.
With Verstappen qualifying 12th and only able to drop eight places, the remainder of the penalty will be a 10-second stop/go during the race.
"I will just deal with it and try to make the best of it," said Verstappen.
"Now I will also have a 10-second penalty, so it means I'm going to have to do some overtaking.
"Hopefully a safety car will help us a bit, so we will try and see we what can do from there. Anything is possible.
"It will be hard to overtake on the straights, but hopefully the race pace will be good so we can get close."