Lewis Hamilton has revealed he will walk away from Formula 1 the moment driving stops making him smile. With pre-season testing just seven weeks away, Hamilton is yet to sign a new deal with Mercedes. Article continues under video While it appears unlikely Hamilton will call time on his career at this moment, the 36-year-old Briton has laid out his criteria for future retirement. “For me personally, we’re all struggling with something," Hamilton told the 'Formula for Success' podcast with Mercedes sponsor Crowdstrike. "You’ve got to find what you’re passionate about and what you love doing, and me personally, in my journey, there was a point where it just got too serious....
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