Kimi Raikkonen was fastest for Ferrari ahead of morning pace-setter Lewis Hamilton in the second free practice session of the Canadian Grand Prix with a lap in 1:12.935. Red Bull duo Max Verstappen and Daniel Ricciardo saw their sessions stop following mechanical issues.
Sebastian Vettel was third fastest just 0.265s slower than his team-mate. Both Scuderia Ferrari drivers used two sets of Super-soft and Ultrasoft tyres.
Championship leader Sebastian Vettel was third fastest in the second Ferrari ahead of Finn Valtteri Bottas, who was fourth in the second Mercedes.
The top four were separated by only 0.375 seconds at the end of a closely-contested session that ended with Vettel complaining that three-time champion Hamilton was slowing him down as he followed him.
Max Verstappen was fifth for Red Bull, before he pulled up in the closing stages with gearbox problems, ahead of Brazilian Felipe Massa of Williams and two-time champion Spaniard Fernando Alonso, who posted an excellent late lap for McLaren Honda to go seventh.
The second Red Bull speedy Ricciardo reported a loss of power after eight laps of the second practice session – a suspected engine failure.
“It’s been frustrating on one hand as it looks like we’ve lost and engine with Daniel and it looks like a suspected gearbox issue with Max,” said Team Principal Christian Horner.
Frenchman Esteban Ocon and his Force India team-mate Mexican Sergio Perez were eighth and 10th either side of Russian Daniil Kvyat in his Toro Rosso.