Rosberg says he has the upper hand, head unchanged

By Camila Moreira SAO PAULO (Reuters) - Nico Rosberg denied his early season problems had been all in the head as the Mercedes driver continued a winning run of form in Brazil on Sunday. "It’s not a head thing," the German said after leading triple Formula One world champion team mate Lewis Hamilton in a one-two for the second race in a row to win in Brazil for the second year running. "My head is in the same place as in the middle of the season where Lewis was faster.