Rosberg on top in opening Belgian GP practice

SPA-FRANCORCHAMPS, Belgium, (Reuters) - Nico Rosberg comfortably topped the timesheets at the end of Friday’s opening practice session for the Belgian Formula One Grand Prix. The German set a pace of one minute 48.348 seconds, 0.730 seconds ahead of Mercedes team mate Lewis Hamilton, on a glorious sunny day at the Spa-Francorchamps circuit. Rosberg was one of four drivers to briefly test the "halo" head protection device during the session, even setting his benchmark time with it fitted to