Holland boss Bert Van Marwijk has warned his players they face a tough task in the 2010 World Cup finals.
Holland were drawn against Cameroon, Japan and Denmark.
He said: “It is a dangerous group and we shouldn’t underestimate any of our opponents.
“Denmark are a strong opponent, We recently beat Japan 3-0 in a friendly match but it wasn’t easy at all and the score was a bit flattering.
“And I consider Cameroon as one of the strongest three countries in Africa.”