"Obviously, a loss putting us out is something that's going to be in the back of our minds," he told a news conference on Thursday.
"We have to approach the game in an intelligent fashion, we need to be smart and not open ourselves up going for a win, just because a loss would put us out of the tournament," he added.
"We have some personal experience against the guys we're playing - you come up against them if you play in Germany, if you play in France," he noted.
"Just because they are not in the (English) Premier League, we're not going to take them any lighter just because maybe the rest of the world doesn't know their name."
"There have been some finals, some matches with the pressure on, where you must win and I think we have had good experiences as a group, we have learnt from important wins and from days when we have let games get us away from us."
"They (Slovenia) are a very good team, (coach) Matjaz Kek has done a very good job, they are very well organised," added Bradley who named midfielder Robert Coren as their engine.
"Tactically they're very smart, their defensive record was outstanding in qualification and they have a good balance, good movement and mobility and some dangerous players - guys we have watched a lot," said Bradley.
