Nico Rosberg fastest in Friday 's practice sessions for Malaysian Grand Prix . Temperatures reached a sweltering 50 degrees at the Sepang Circuit . Temperatures reached a mercury-busting 50 degrees at the Sepang Circuit , impacting tire performance in the afternoon session . The German driver was quickest on his first run of the day, with Lewis Hamilton second and Sebastian Vettel third.
Nico Rosberg fastest in Friday 's practice sessions for Malaysian Grand Prix . Temperatures reached a sweltering 50 degrees at the Sepang Circuit . The German driver was quickest on his first run of the day, with Lewis Hamilton second and Sebastian Vettel third.