Rosberg bemoans 'unfortunate' incident

Rosberg hit McLaren's Lewis Hamilton at the end of the pitlane after the Briton had hit the Ferrari of Kimi Raikkonen before.

Rosberg lost his front wing in the incident but was able to continue in the race and finish in 10th.

The German, however, will be hit by a grid penalty in France.

"It was great to begin with and it was going fantastically at the start," said Rosberg. "I passed Alonso into turn one and I was getting away from him, yet at the same time I wasn't losing too much to Massa in front. But then there was the incident in the pitlane, which really was unfortunate.

"Later in the race I tried to pass Vettel as it was really necessary to have a go, but I got off the clean line and went wide and Heikki Kovalainen got past me. I am now looking ahead to the next race in France where naturally we will be hoping to achieve a better result."

Teammate Kazuki Nakajima retired from the Montreal race after he crashed at the pitlane entry when his front wing got stuck under his car and stopped him from steering.

The Japanese driver had damaged his wing moments earlier when making contact with Honda's Jenson Button.

"With all the other incidents in the field, it was going well, but then when I was following Jenson, it seemed as if he got on the marbles in the middle of the hairpin and lost traction, and I couldn't avoid him," he said. "I damaged my front wing and it was coming off.

"When I came into the pitlane, it detached itself completely and was stuck under the chassis, so I couldn't make the corner, so that was it for me."