While the conditions weren't ideal out on track on Friday, Silver Arrows Technical Director James Allison is expecting another good battle for the top spots come crunch time on race day.
"We had a trouble-free day with both cars which allowed us to get through our planned practice programme," said James.
"As always on the first day in Canada, conditions were tricky owing to the low grip levels and the circuit seemed particularly dirty today. That factor, plus the number of cars on a short lap, made it difficult to put together consistent and meaningful running.
"Nevertheless, what we have seen so far suggests that we will have another ding-dong battle on our hands, like at the first six races - and it is very hard to predict who will come up with the goods on Sunday."