Lewis Hamilton admits he lacks the confidence to be a late braker in the W04

Lewis Hamilton has admitted he is still struggling to put the brakes on Nico Rosberg because he lacks the confidence to commit to his late-braking style in the Mercedes W04.

Any sign that Mercedes have finally found a cure for their longstanding habit of over-heating their rear tyres will inevitably be attributed to their participation in the now-infamous three-day tyre test at Barcelona following the Spanish GP. The team have been summoned to appear at a specially-convened hearing of the FIA International Tribunal and, having driven at the test, Hamilton may be called upon to testify - just as he was in 2007 for McLaren during the the 'Spygate' scandal. It's a prospect he is keen to avoid, however. "I don't think I'll be required to do that. I've been there, done it before with McLaren, so I don't think I need to be involved in that area," he said. "I remember going the last time. Although I don't remember much of what exactly happened, I know it wasn't a good period of time. I just remember the good times."