Toto Wolff said Mercedes was "sorry to have let Lewis [Hamilton] down" as he was forced to retire from the Canadian Grand Prix.

Both Mercedes cars had issues during the race, with Hamilton having to retire due to overheating rear brakes and team-mate Nico Rosberg being able to nurse the car home in second place to extend his championship lead. Wolff said the team was disappointed with the DNF but feels Hamilton has every chance of closing the 22-point gap quickly.

"We're just sorry to have let Lewis down," Wolff said. "It's a shame, particularly when the championship is as close as it is, but he is in good spirits and he is a fighter. I have no doubts that he will come back.

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"As for Nico, he deserves to take those points because he had a car which was heavily handicapped against all others. He managed to pull out a mega first sector where the power loss was not as bad as the back straight. The second sector was OK and he deserves to have that second place."

When it was put to Wolff that the odds are against Hamilton winning the title now, he replied: "I wouldn't say that.

"How many races are we in to the season; seven? So we have another 13 races, we have double points ... I would guess that between the two of them it's going to come back to the end of the season with double points."

Explaining the problems that the drivers faced, Wolff said it was just a case of luck that Hamilton's car was unable to continue and Rosberg's was.

"We told both drivers to manage the brakes, because when you lose the electric motor you lose the electric braking so the brakes were overheating massively. So we changed the balance within the braking system and told them to be more careful. It's what both of them did - both of them complied with exactly what they were told - and then it's very marginal.

"Lewis entered in to the pits, stopped the car, the temperatures rise and when he went out the pedal just went soft and then fell out completely. On Nico's car he was lucky not to have that.

"The system was so hot that when he lost the cooling by being static in the pits the temperatures just peaked like a regular, conventional race car."