In-form German Nico Rosberg and his Mercedes team are confident of a strong showing in Canada next weekend - when a revived Michael Schumacher could also be a major threat.
Mark Webber did his CV and his future employment prospects a power of good last Sunday when he claimed his second masterful Monaco victory in three years.
McLaren's Lewis Hamilton swept the opening day of the Canadian Grand Prix by going fastest in the second free practice session at the Circuit Gilles Villeneuve in Montreal.
Defending drivers' champion Sebastian Vettel topped the times for Red Bull on Saturday morning during the final practice session ahead of qualifying for Sunday's Canadian Grand Prix.
Mark Webber took advantage of late drying conditions to clock the fastest time for Red Bull in Saturday's delayed and truncated final free practice session for Sunday's Canadian Grand Prix. Classification and track debrief
Mercedes boss Ross Brawn confirmed on Friday that he made the decision for his team to be part of a Pirelli tyre test in Spain that is being investigated as a possible breach of the sport's rules.
Sebastian Vettel has earned pole position for the Canadian Grand Prix for the third consecutive year.