London:  Lewis Hamilton believes his Mercedes team is now Red Bull's closest challenger and will be capable of mounting a sustained bid for Formula One glory this year.In the wake of last weekend's Malaysian Grand Prix in which champions Red Bull were split by Sebastian Vettel's decision to ignore team orders and pass team-mate Mark Webber to win, the 2008 champion has pointed to the potential of his outfit.In the same race, Hamilton's team-mate and friend Nico Rosberg was asked to finish fourth behind him and obeyed.Hamilton said: "We are the second best team... To be that close - I was competing with the Red Bulls at some stages in the race - and to be in that position is a...
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