The 34-year-old, who was heavily linked with a move away from Loftus Road during the close-season following the Rs' relegation from the Premier League, sustained the injury in training on Tuesday and is expected to be sidelined until the end of October.
|13/8||QPR are 13/8 with William Hill to win the Championship
"It's a difficult situation with Julio and I'm surprised no one came in for him," Redknapp told the media.
"I don't know whether Julio wants to sit on the bench. His dream is to play in the World Cup in Brazil and I don't think this will affect his situation.
"The manager of Brazil thinks he's the No.1 man and I don't think anything that happens at QPR is going to change that for him."
QPR have also been dealt another injury blow after it was confirmed that striker Bobby Zamora has undergone surgery on a knee problem that will rule him out until the end of December.