MONTREAL, Canada -- Mercedes boss Toto Wolff says the team is yet to find the "holy grail" with set-up to perfectly utilise Pirelli's softest tyre, despite beating Ferrari to pole in Canada.
A scintillating Lewis Hamilton lap put Mercedes back in front of its title rival on Sunday's grid, reversing Ferrari's strong pace from practice. Mercedes arrived in Canada having struggled to extract performance from the ultra-soft tyre in Monaco -- a tyre being used again this weekend -- where both drivers finished off the podium and Ferrari recorded a one-two finish.
Hamilton's gap of 0.330s to Vettel was helped by Mercedes tweaking its strategy around tyre preparation during qualifying.