One week before the Canadian Grand Prix, the FIA declared the floor used by Red Bull in Monaco to be illegal, forcing the team to change the offending parts for the Canadian Grand Prix. Despite the ruling, the team's results were kept intact. The team was also forced to change the design of their axles, after FIA Race Director Charlie Whiting felt that holes in the axles contravened the technical regulations. Nevertheless, Sebastian Vettel comfortably took pole position by three-tenths of a second. Vettel controlled the early phase of the race, but was caught and passed by Lewis Hamilton before the first round of stops, while Fernando Alonso slipped through shortly afterwards. All three drivers were using a two-stop strategy at the time, but as Hamilton made his second stop, both Alonso and Vettel shifted to a one-stop strategy, with Alonso's team resorting to discussing strategy options in his native Spanish to prevent their rivals from overhearing their plans. Hamilton had twenty laps to make up a twelve-second deficit, and he easily reeled Vettel in; in response, Red Bull pitted the reigning World Champion, and Vettel fell to fifth. Hamilton's next target was Alonso, whose tyres lost all grip and he fell victim to Hamilton, Romain Grosjean, Sergio Pérez and Vettel in quick succession. Hamilton won the race, becoming the seventh winner in seven races and taking a two-point lead in the championship. Grosjean's second place saw Lotus take third place in the Constructors' Championship from Ferrari. Both Grosjean and Pérez expressed surprise at finishing on the podium, while 2011 winner Jenson Button finished sixteenth in what he described as his "worst race in years" and Michael Schumacher suffered a hydraulics failure that left his drag reduction system (DRS) device jammed in the open position.