"I don't know much about Portsmouth," said the Dutchman. "But we will do our homework before the game and we will not take this match easy.
"I've seen them on the highlights of the Premier League but we know it will be a hard game. They have some experienced players such as Sol Campbell who is an excellent defender.
"The crowd will be very special. In a small stadium they will make a very good atmosphere and I'm looking forward to it."