Mystery men may be Dunga's worst nightmare

Brazil were held 0-0 at home by Bolivia, Colombia and Venezuela in the World Cup qualifiers, each time struggling against ultra-defensive teams, and are set to face more of the same against North Korea, the lowest ranked of the 32 finalists.

Few teams can have prepared so long for a game as the side from the hermit state, who have spent more than four months together in a training marathon which has taken them to Sri Lanka, Germany, Switzerland, Austria, Mexico and Venezuela.

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