"Benfica are a good team with the ball, and they did not like to give it away," said Kromkamp.
"The Portuguese international Petit is important to them in midfield and most of their play goes through him.
"If you give Simao time to control the ball and size you up he can be hard to play against, but we have excellent defenders who cope with top players all the time.
"Nuno Gomez is a tough striker because he can score every type of goal - in the air and with both feet and he's always alert.
"The one way we can exploit them is in defence. At home their fans will want them to come out and attack us and they get both their full backs involved. That could well give us the space to exploit because there will be spaces at the back. That is where we will have joy.
"We are holders of the European Cup and we must defend it with all our lives.
"I am pretty disappointed not to be able to play any more times in Europe this season, but that is just the way it is.
"The Champions League was very nice to play in because it was a very high level with almost all the world watching the matches.
"I'd love to be playing against Benfica but I am sure the lads will do a great job and progress, my focus has to be on domestic football but I will there supporting the team from the stands."