By Daniel Wilson.
Championship leader Lewis Hamilton looked on form once again as he topped all three practice sessions ahead of the United States Grand Prix.
The Briton narrowly edged his teammate yesterday by 0.003 seconds but was nearly nine tenths clear in final practice.
However, reliability remains a concern for Mercedes as both drivers have suffered minor problems.
Hamilton was forced to cut his long-run short yesterday after a leak in the right-rear of the car, and continued to struggle this morning with a series of lock-ups and a spin at turn 12.
Rosberg meanwhile was unable to challenge his championship rival in third practice as he suffered a glazed brake disc and traffic on the soft tyre.
Williams look like being best of the rest, but are still over a second down on the Silver Arrows. They look like fending off Ferrari once again as they look to preserve third in the constructors.
Red Bull have had a difficult start to the weekend as Sebastian Vettel was confirmed he will start from the pit lane in Sunday’s race after changing to a sixth engine. Daniel Ricciardo has also had problems wit the rear balance, but ended up sixth.
McLaren will be relying on hotter track temperatures in qualifying to get further up the order after finishing 10th and 11th this morning.
The remaining teams will be battling to get out of Q1 as only nine teams compete this weekend after Caterham and Marussia go into administration, and will miss this weekend’s GP.
Despite the gap in final practice however, its clear it is going to be a close fight between Hamilton and Rosberg for pole position and for victory tomorrow.
I just pray reliability does not play any part in the final three races of the championship.
Send us your thoughts and predictions for qualifying.
What do you make of the absence of Caterham and Marussia? Is F1 under threat?
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