Fernando Alonso says McLaren must focus on reliability after he was forced out of the two most recent Formula 1 races in Spain and Monaco.
McLaren scored its first points of the campaign courtesy of Jenson Button in Monaco but Alonso endured a third retirement of the season to continue his difficult start to 2015.
"Jenson’s points in Monaco were a great boost for the whole team and more proof of the progress we are making race by race," said Alonso.
"On my side of the garage, it’s disappointing to have had two technical issues in a row, but as usual we’re working extremely hard to understand these problems.
"Reliability is always the most important factor, so before performance we must focus on making sure we start the weekend positively and maximise the practice sessions to get our car properly set up for this track."
Alonso added that his priority is to have a weekend without issues in Canada.
"The circuit itself is tricky – that’s what makes it so special – and always provides great racing," he said.
"It’s obviously very different from Monaco because it’s so high-speed, but, like Monaco, there are lots of technical corners that mean you need to focus on having good balance and downforce in the car, especially under braking.
"Despite the reliability issues I’ve had in the last two races, the car has felt good, so our priority is to have a trouble-free weekend and get the maximum performance out of our package."