PRACTICE DEBRIEF: Can Mercedes stay on top or will McLaren bounce back in Canada?

George Russell got his first FP2 top-spot of the year as he set the pace for Mercedes at a sunny but chilly Circuit Gilles-Villeneuve in Montreal. Meanwhile championship leaders McLaren had one of their trickiest – if not the trickiest – opening practice days of the year. But do the Silver Arrows have what it takes to stay on top?