Lewis Hamilton said the new Mercedes chassis he had for the United States Grand Prix completely transformed his competitiveness.

The 2008 Formula 1 world champion had struggled to match team-mate Nico Rosberg in India and Abu Dhabi.

Mercedes discovered a crack in Hamilton’s chassis after the latter race and provided a new one for Austin.

Hamilton qualified fifth and finished fourth in America, to his delight.

“The car was click here for more