Armed with fresh tyres, Russell was chasing down second-placed Lando Norris and leader Carlos Sainz in the closing stages of a pulsating race in Singapore when his pursuit of victory ended in the barriers.The heartbreaking crash on the final lap left a visibly-emotional Russell feeling as though he had “let myself and the team down”. But seven-time world champion Hamilton, who ultimately inherited the final spot on the podium, was full of praise for Russell and offered to help the younger Briton get even better. "We are all trying to be millimetre perfect out there and it's very, very easy to make mistakes.…