AUSTIN, Texas (Reuters) – Formula One championship leader Lewis Hamilton and his title rival team mate Nico Rosberg were separated by mere fumes on Friday in a familiar Mercedes one-two in US Grand Prix practice.
Just three thousandths of a second separated the two at the end of the day, with Hamilton top in both sessions despite a hydraulics problem that sidelined him towards the end of the second.
“The car felt good today and we were able to improve consistently over the two sessions,” said the Briton.
“I only got a couple of laps of my long run which was unfortunate as we lost a bit of track time but Nico got the data for the team so we should be OK.
“These small glitches happen and I’m confident that we won’t have problems moving forward.”
Hamilton, chasing his fifth successive win and 10th of the season, set the morning pace with a time of one minute 39.941 seconds at the undulating Circuit of the Americas.
Rosberg, 17 points behind his team mate with three races to come worth a maximum 100 points, was 0.292 seconds slower than the 2008 world champion.
Hamilton then produced a 1:39.085 in the afternoon, a massive 1.1 seconds quicker than third placed Ferrari driver Fernando Alonso. The difference between the two was the same as that between Alonso and 16th placed Adrian Sutil.
“It looks very close with Nico out there and I’m expecting a very tough battle this weekend,” said Hamilton.
McLaren’s Jenson Button had been third fastest in the opening session with just 18 cars on track after Caterham and Marussia went into administration and failed to make the journey to Texas.
Mercedes, who have already wrapped up the constructors’ title, can equal McLaren’s 1988 record, set by Alain Prost and the late Ayrton Senna, of 10 one-two finishes in a season in Sunday’s race.
There were only 16 races in 1988, compared to 19 now.
Toro Rosso’s Russian rookie Daniil Kvyat, who graduates to the main Red Bull team next year in place of departing four times champion Sebastian Vettel, was fourth fastest in the morning ahead of Denmark’s Kevin Magnussen in the other McLaren.