Nico Rosberg seized the Formula 1 championship lead from aggrieved Mercedes team mate Lewis Hamilton in Monaco but he may have to hand it straight back in Montreal this weekend.
With their rivalry sure to be as fierce as ever, despite both drivers playing down talk of feuding in recent days, Hamilton can be expected to hit back hard at one of his favourite circuits.
The 2008 world champion has won three times in Canada and took the first grand prix victory of his career at the Circuit Gilles Villeneuve, with McLaren in 2007.
Until last year, when he started on the front row and ended up third behind Red Bull's Sebastian Vettel and Ferrari's Fernando Alonso, the 29-year-old Briton could...
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