"We're conscious we have to win on Monday. Perhaps we lacked a bit of daring in the last third of the pitch against the Ivory Coast. We have to go for goals," Eduardo told reporters.
"But we played against a strong team, well organised and physically powerful. In this competition we've seen matches are complicated as teams are well organised. Sometimes even a 1-0 win is like a rout," he added.
If Ronaldo's terrific effort had hit the net it would have been his first goal for Portugal in a competitive match for two years. The forward's plight is part of a longstanding goalscoring problem for the Portuguese.
The aftermath of the draw in the opener included Deco's criticisms of coach Carlos Queiroz's strategy. The playmaker has apologised and is expected to start on Monday.
Asked if he could name five North Korean players, Eduardo said: "No, they are very difficult to pronounce. But the important thing is to know what they are capable of and what their main weaknesses are, so we can take full advantage."
