Dr Orava believes however that the 34-year-old will be able to make a full comeback after his rehabilitation is complete.
"I think it went quite fine," Dr Orava told Sky Sports News. "The prognosis is he needs a rehabilitation for the next few months, and the plaster cast is the next six to eight weeks.
"I would say that [it will be] maybe four months before he's running, but six months before he's jumping and kicking. I think that he understood it's a serious injury and he's not able to contemplate [the World Cup].
"Usually people can do what they have done before if everything goes fine."
Become a fan of Goal.com International on Facebook! Just click onto Facebook.com/Goal to join the beautiful game's leading fan community...