• Briton’s switch to Scuderia has been questioned
• ‘I will work to be better … I use that as fuel’

Lewis Hamilton says the criticism he has received throughout his career has only made him strive harder to improve.

On Thursday Hamilton dismissed criticism from the former F1 team owner Eddie Jordan and the former F1 chief executive Bernie Ecclestone. On Friday, the final day of Formula One testing in Bahrain, the seven-times champion doubled down against his detractors, saying the comments only encourage him to prove them wrong.