Pirelli has responded to Sebastian Vettel's criticism of its tyres after the Red Bull driver delivered a dominant performance to win in Canada last weekend.
The reigning World Champion led from start to finish around the Gilles Villeneuve circuit when low tyre degradation allowed the German to push his RB9 harder than he could during the early parts of the season.
After celebrating his victory, however, Vettel was again critical of the Pirelli tyres, suggesting that they are unsafe to race with.
In an interview with AUTOSPORT, Pirelli motorsport director Paul Hembery said that he doesn't know why Vettel keeps criticizing the tyres.
"They have been strong, but some of the comments are very difficult to understand when you look at the performance,"" Hembery noted.
"Maybe some other teams might have a reason, but you are leading the championship, and still complaining?
"You win the race and I have seen some complaints again here [in Canada], and those sorts of things are not helpful."
The reigning constructors champions Red Bull has been the strongest critics of the rubber used in this year's tyres which tends delaminate faster than the tyres used last year.
Pirelli, however, insisted that the delamination poses no safety threat because the tyres remain inflated, but that they want to eliminate the incidents because it influences the public image of its products negatively.