Sebastian Vettel and Red Bull continued where they left off by dominating Friday practice at the Indian Grand Prix.
Needing just a fifth place finish to be crowned champion, Vettel is looking for far more than that as he looks to remain the only driver to have won at the Delhi circuit.
The morning was characterised by dusty conditions as all the drivers evaluated the medium compound tyres.
McLaren led the early running through Sergio Perez, as teammate Jenson Button took a look at the 'radical' set-up he has on his MP4-28 this weekend.
The front running teams joined in around halfway through the session with Mercedes' Nico Rosberg moving to the front until Vettel started to push his RB9.
In a long run that saw him back off on alternate laps, it was his sixth 'flying' lap that saw the 1:26.683 which would keep the German fastest.
Rosberg kept second until late on when Mark Webber jumped his Red Bull into second spot, just 0.188 behind Vettel and fractions ahead of Rosberg.
Romain Grosjean continued his impressive form with fourth ahead of Lewis Hamilton, Button, Perez and Felipe Massa completing the top eight.
Kimi Raikkonen did not complete a lower fuel run and languished down in 17th while Fernando Alonso was hampered by gearbox trouble finishing in 12th.
In the afternoon, the action started early as the drivers set out completing a comparison between the medium and soft compound.
Rosberg completed the medium tyre phase on top, just one thousandth of a second ahead of Webber and half a tenth clear of Vettel, however that all changed when the yellow-marked tyres came out.
Grosjean moved into P1 as he found a second in performance from the softer rubber but Red Bull found even more as Vettel dipped below 1:26 with a 1:25.722 giving him over three tenths advantage to Webber behind.
Grosjean stayed in third with Hamilton, Alonso, Rosberg, Massa and Raikkonen behind. Less than half a second covered those six drivers, and McLaren completed the top 10 with Perez ahead of Button.
On the long runs Red Bull continued to look strong, particularly on the medium tyre, however the soft tyres are showing signs of extreme wear through the high speed and long radius corners.
Williams had a major issue with Pastor Maldonado as the front right wheel nut came loose through one of the high speed chicanes and as he tried to get back to the pits the tyre punctured leaving him stranded at the pit entrance.
The day belonged to Vettel however who looks unstoppable once again in India, the soft tyre issues could offer hope to Lotus, who look after their tyres much better than most including Red Bull, but that appears to be the only hurdle between Red Bull and another masterclass en route to clinching both championships.
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