Paul Hembery: "The rain in the morning meant that the drivers didn't really get to assess the new construction of the rear as thoroughly as they would have liked to, but initial feedback has been positive. We'll be analysing a lot more data about this new construction over the next few days before drawing a final conclusion, but we don't expect this to be a massive change. It's only a minor alteration to ensure that none of the previous delaminations - which do not impact on safety - recur, and it doesn't affect the fundamental characteristics, performance or durability of the tyre.
"Canada is always one of the most challenging circuits for the tyres, because of the layout of the track and also the heavy braking, which puts plenty of heat into them. Conditions today could well be representative of what we have in the race, with around 17 degrees ambient and track temperature, and we've seen good durability and performance from both compounds so far - with little graining despite the cool temperatures. It's hard to make a prediction about the number of pitstops at this point because the track is still very green and there are so many variables here, but we've seen some long runs from the super=soft in practice with no significant drop-off in performance, so this certainly looks set to be the tyre to qualify on tomorrow."