German GP: Nico Hulkenberg, Renault Sport F1 Team R.S. 18, runs through stones dragged on to the track by Marcus Ericsson, Sauber C37 Ferrari.
Nico Hulkenberg, Renault Sport F1 Team R.S. 18, runs through stones dragged on to the track by Marcus Ericsson, Sauber C37 Ferrari.