Sergio Perez was one of the big losers at the Canadian Grand Prix last weekend. The Mexican followed up a Q1 exit with a DNF, and he also has a grid penalty to carry into Spain. Perez has now failed to reach Q3 in each of the last three races and started from 16th for the second weekend in a row. In Monaco, he only made it a couple of corners before a race-ending collision with the two Haas cars, but in Montreal the chequered flag was coming into view. It was lap 53 out of 71 when Perez spun into the wall after losing control of his car at turn six. He broke his rear wing in the process, crawl…