Red Bull boss Christian Horner claims that it is Sebastian Vettel's failure to understand the team's 2014 contender that is causing him to lose out.Ignoring, the problems suffered by both drivers in Melbourne, Sunday's Chinese Grand Prix saw Vettel beaten by new teammate Daniel Ricciardo for the second successive race.Furthermore, in a move which will have given grist to the mill of various sections of the media the German was none too happy when asked to allow the Australian by on Sunday. Querying the call to let Ricciardo past, the world champion was advised that he was on fresher tyres. 'Tough luck!' was the tetchy response.Nonetheless, a few corners later the German appeared to move...
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