"We have been confident all tournament," Goal.com quotes Vertonghen as saying. "We believe in ourselves. We are feeling strong physically and mentally.
"Belgium don't have to fear anyone. We have all been looking forward to this tournament. It's all about games like this for us. But it doesn't have to stop here against Argentina.
"We want to put in a great fight and go even further. This is all a reward for our hard work."
Belgium last reached the final eight of the showpiece event in 1986.