The AC Milan player has been bothered by a tendon problem in his right foot since the last rounds of the Italian league season.
Ibrahimovic told reporters Tuesday that ''people probably haven't taken this injury seriously enough. I have been playing on painkillers before, but I'd rather not do it.
''But we have to be smart, it's better if I'm not fit that someone who can give 100 percent plays.''
He said he hopes coach Erik Hamren can ''wait to decide whether I play until an hour before kickoff'' in the away match against Moldova on Friday.