Barcelona F1 test: Button leads first morning for McLaren

The McLaren driver, completing some aerodynamic evaluation for his team, elected to run Pirelli's softest tyres to set his best time of 1m23.753s a few hours in to the session, but Sebastian Vettel was only just behind him. Vettel kicked off a key test for Ferrari to set the second fastest time, as the team focused on resolving its qualifying issues and getting to the bottom of what ... Keep reading