Zico - Mammoth test facing North Korea
Brazil legend Zico believes North Korea will need to be at their best if they are to create a shock and progress from a tough group at the World Cup.
The East Asians open their Group G campaign against five-time World Cup winners Brazil on June 15 before playing Portugal and the Ivory Coast.
Zico said: "Brazil are a very strong team and so are Portugal, so North Korea need to be at their absolute best to be able to get through the group."
He added: "The Asian teams need to learn from the world's best teams at the World Cup so they can get more experience and hopefully one day be at the same level as them."
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