Ferrari could turn the race for Montreal victory into a three-team scrap, according to David Coulthard.
The BBC commentator and former 13-time grand prix winner observed after Friday practice in Canada that Red Bull and McLaren are not the only likely protagonists this weekend.
"Don’t discount Ferrari," said Coulthard in his Telegraph column, after Fernando Alonso topped the afternoon session. "While most people are forecasting Red Bull v McLaren, Alonso could be strong.
"The tyre compounds here are the soft and the super soft, which Ferrari got on well with in Monaco. I’m expecting a three-way fight."
Also strong on Friday was Mercedes, with Nico Rosberg fastest in the morning session, but Coulthard predicted: "They might do well in qualifying but I’m not sure they can keep it up during the race."