Mercedes boss Toto Wolff says his team's victorious weekend in Montreal was achieved against a backdrop of multiple worries for the manufacturer. Mercedes' concerns started in Saturday morning's free practice session, when Lance Stroll's batnd new engine went up in flames, generating fears that the cause of the failure could spread to all of the manufacture's upgraded Phase 2 power units. But on Sunday, the tension in the Siber Arrows camp ramped up a few notches when a hydraulic leak was detected on Lewis Hamilton's car, forcing Mercedes' crews to replace the entire system in time for the race. Scenes from the paddock: Montreal It all looked calm and collected from the outside, but Wolff...
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