Hamilton: Sochi my toughest weekend since Baku

Hamilton finished a frustrated fourth at Sochi, and remains in second place in the F1 world championship behind Ferrari's Sebastian Vettel.The Briton crossed the finish line over 36 seconds behind teammate and race winner Valtteri Bottas."It's been a very tough weekend," admitted Hamilton, who finished in the same position that he qualified."I can't remember having as difficult a ... Keep reading