Lewis Hamilton unapologetic for terse exchange with Ferrari at Miami Grand Prix

• Driver frustrated by time taken to give orders over team radio
• I've still got my fire in my belly,' says seven-time world champion

Lewis Hamilton has insisted he will not apologise for remaining fiercely competitive after his terse exchanges and clear frustration with his Ferrari team at the Miami Grand Prix, which he believed merely indicated he was motivated as ever to perform on track.

I was like, come on guys, I want to win. I've still got my fire in my belly," he said. I'm not going to apologise for being a fighter. I'm not going to apologise for still wanting it. I know everyone in the team does too."