By Ian Parkes, Press Association Jenson Button does not believe Nico Rosberg will fall prey to Lewis Hamilton's mind games this season. Button knows only too well how Hamilton ticks following their three years together at McLaren from 2010-2012. In what appears to be a clear battle of the Mercedes team-mates for this year's Formula One world title, Hamilton appears to have already started employing psychological tactics with Rosberg. Familiar sight: Lewis Hamilton (right) secured his fourth straight victory in Spain by pipping Mercedes team-mate Nico Rosberg Easy street: Hamilton's fourth straight grand prix win sent him top of the drivers' standings
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Hamilton has won four out of five Formula 1 races this season
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Mercedes team-mate Rosberg won opening grand prix
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Button admits 2008 world champion tried similar tactics during their period as McLaren team-mates
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2009 world champion would be amazed if Mercedes don't win every race
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German team led home one-two finishes in last four rounds
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Button warns Mercedes that they owe fans by allowing drivers to race fairly
With Mercedes dominating the year, with five straight victories and four successive one-twos, Button believes @placeholder could yet make history and become the first team to win every race in a season.