"We are looking good for a playoff berth after demonstrating our class in this historic double win over Belgium," said Blazevic, who guided his native Croatia to third place in the 1998 World Cup.
"I dread the possibility of playing my Croatia for a berth in the finals, I wouldn't know what to feel because I would really have mixed emotions about it.
"I'd rather play Switzerland, which is also my home, but the most important thing is that we make the most of our good schedule and don't let this opportunity slip."
Bosnia's accomplishment triggered mass celebrations in Sarajevo and other cities as it brought the Muslims, Croats and Serbs together in a rare display of national pride in an ethnically divided country.
"Blazevic deserves a statue because he has made us love our country again," said a teenage girl in Sarajevo, where fans waved Bosnian flags from the car windows of a seemingly endless motorcade.
Bosnia's team includes players from all three ethnic groups and another fan said the squad should serve as "a model to Bosnian politicians in building a prosperous state."
"I was proud more than ever to hear the fans cheer in one voice Serb goalkeeper Nemanja Supic and myself," he said.
"Few teams can beat Belgium twice in (the space of) four days and that shows the team chemistry is fantastic."
