Both sides last met at the 2006 World Cup, when referee Valentin Ivanov needed 16 yellow and four red cards to keep things under control, and Boulahrouz is well aware of the Seleccao's antics as both sides meet once more.
|THE GOAL LINE | EPISODE 11
|Layla Anna-Lee presents our latest show, as Greg Stobart previews Sunday's Group B matches
"We absolutely don't fear Portugal. During our last encounter [at the 2006 World Cup], all kinds of incidents occured on the pitch," Boulahrouz stated to De Telegraaf.
"I had the feeling we were able to win that match, though.
"We are all familiar with the Portugese style and their antics. They don't mind giving a few nasty kicks, we all know that.
"So it's important that we remain focused on our own play. We shouldn't let them try to make us crazy.
"We have things on our mind that are more important than kicking, beating and spitting.
"We're focused on winning this match, that's what we will try. We know how the Portugese can play, so we are prepared on that."
Sunday's encounter in Kharkiv kicks off at 20:45CET.