Hamilton said: “I just said to the [Mercedes] guys, if I was in second and I had the pace that I had today, I would have been pushing to be as close as possible and passing. That’s racing. They said maybe he [Rosberg] was just comfortable with second and I said well that’s the difference between us.
Boom.
http://www.theguardian.com/sport/2015/apr/13/lewis-hamilton-nico-rosberg-didnt-try-mercedes-chinese-grand-prix-shanghai