England v India: Cook wants team to be 'ruthless'

England captain Alastair Cook says his side must take the emotion out of the game and "be ruthless" when they take on India in the fourth Test in Nagpur.

England won by 10 and seven wickets respectively in , external and Kolkata to lead 2-1 and move within sight of a first series win in India since 1985.

BBC Sport's Joe Wilson reports.

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