They will still have to advance through the round of 16, where they will face Group C's second-placed Turkey, and quarter-finals.
But avoiding Team USA until the medal matches undoubtedly puts them one step closer to capturing an elusive medal.
Solvenian star Goran Dragic claimed on Twitter the outcome was "fixed", suggesting Australia lost to Angola on purpose.
"Basketball is a beautiful sport, there is no room for fixing the game like today Australia vs Angola!! @FIBA should do something about that!" he posted.
When challenged by reporters on whether his side had contested the match in the spirit of the game, Lemanis was defiant, arguing the heavy tournament schedule demanded he rest his players before the next stage of competition.
"People will make up their own minds," the former New Zealand Breakers coach said.
"There's always going to be speculators. I can't control what people think."
- AAP