Michael Schumacher says he is confident of being able to challenge for victory in Canada this weekend as he seeks to turn his difficult season around.

The seven-time champion has shown his speed in qualifying so far in 2012, but a dismal run of form on race day has seen him retire four times and only manage tenth place in the two races in which he has made it to the finish.

By contrast, team-mate Nico Rosberg has battled back from failure to score in the first two races to vault up the standings with four strong results - including victory in China - and Schumacher said he was confident of joining his countryman in challenging towards the front.

"I'm very confident on this," he was quoted by Sporting Life when asked if he was as close to victory as ever before. "If you look at my comeback from the start to now, we are as close as we can be to having a good result this weekend."

Schumacher was quick to point out however that any hope he had of an eighth world title is already gone, although team-mate Rosberg could still secure glory for the pointed star.

"I've said from the beginning of the season that this year would not be one in which we fight for the championship," he said. "I might be wrong because Nico has proven he is still in the game. It's still a long year and we'll find out whether that will be the case or not.

"But from my point of view, with just the two points I've scored, I don't need to think about the title."