Sebastian Vettel and Red Bull put themselves in firm control of this weekends Singapore Grand Prix by dominating second practice at Marina Bay.

Vettel's 1:44.249 saw him six tenths clear of team-mate Mark Webber and a full second ahead of the first non-Red Bull of Nico Rosberg. His team-mate Lewis Hamilton was fourth.

The midfield was close with 1.6 seconds covering Rosberg in third to Felipe Massa in 15th. Fernando Alonso and Romain Grosjean were fifth and sixth, though Grosjean would be forced to cut his session short with hydraulic issues in his Lotus.

Jenson Button's McLaren a useful seventh, Kimi Raikkonen down in eighth Adrian Sutil and Sergio Perez also made the top 10.

Such is F1 at the moment that positions 5-18 are up for grabs and one mistake can lose you ten positions very easily.

Toro Rosso are well in that battle and their two drivers Daniel Ricciardo and Jean-Eric Vergne were just outside the top 10 in 11th and 12th though they will be firmly in the Q3 battle tomorrow.

Other driver's looking for a top 10 grid slot will be Paul di Resta and Nico Hulkenberg though they too couldn't make it there in practice taking 13th and 14th respectively.

Felipe Massa is one of those drivers most under threat by the midfield and that showed as he could take 15th fastest on Friday.

Other driver's will be looking just to make Q2 with Esteban Gutierrez and the 2 Williams drivers likely battling to join the 2 slow teams in that knock out zone in Q1.

Williams' Pastor Maldonado will certainly be looking to improve after a difficult second session saw him in that 18th place as well as the first man to damage his car hitting the wall at turn 13.

The battle at the back looks as close as ever both Caterham's were able to beat the 2 Marussia's in second practice but all four cars were covered by just four tenths of a second.

The tyre situation looks very interesting with the super-soft tyre some 2 seconds faster if not more than the medium compound over a single lap but the medium compound proving much more durable. As a result teams will need to decide whether it is faster to use the super-soft and the extra pit-stop or use the slower tyre but do one less pit-stop.

Such a situation could benefit Lotus and Ferrari who are well known for being able to look after the softer tyres so therefore could have a much quicker pace than those who don't look after the tyres so well i.e. Mercedes and Red Bull.

Overall it's looks as though it will take an external factor to stop Vettel this weekend so some will be hoping for rain while others may hope the tyres could help stop the German run away to another grand prix win.

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