Hamilton had revealed concerns before the race about his engine -- fitted overnight Friday with a new fuel injection system -- but on a near-perfect warm autumn afternoon in Texas he made a clean getaway when the lights went out.
Drivers described technical and sporting changes as "disruptive" last week.
The report claimed that the McLaren driver was not declared fully fit to take part in the coming GP.
Rosberg won his fourth straight GP after claiming the final three races of last season.
World champion Lewis Hamilton scorched to his 50th career pole position at the Australian Grand Prix on Saturday as Formula One`s new-look qualifying format fizzled out in an embarrassing anti-climax.
Hamilton posted a lap of one minute 29.725 seconds in the opening session.
Ferrari showed impressive pace during pre-season testing and are considered the team most likely to dethrone Mercedes, who have dominated the last two seasons.
Kehm says every sentence is a catalyst for new inquiries.
Mercedes said a transmission problem was to blame.
The first qualifying session of the season will be in Melbourne on March 19.
Schumi continues to be treated at his home near the shore in Lake Geneva.
The Halo was tried on track by Ferrari's Kimi Raikkonen on Thursday.
It was the first time in 2016 testing that the world champions had led the timesheets at the end of the day.
Mallya, known for his flamboyance, says he still is the boss at Force India.
The season starts in Australia on March 20 but the new qualifying format will require changes to the software controlling the timing system.
Hamilton claimed the change to heavier hybrid cars in recent years is the real problem with the sport rather than the lack of competition.
Retirement is still far away, I only hope that I will decide it and not my body.