The Croatian national team doctor says its a 10-14 day injury, while I read on some other sources it could be months, who knows, more tests will be done tomorrow.
Unfortunately he has had a lot of injury problems and only played 5 matches in qualifying, but he would be a huge loss. Croatia have absolutely no depth at defense, we played Corluka at left back at times ffs! Speaking of him, if Lovren's injury is severe one option is to move Corluka at CB. Only other options are a 2.Bundesliga defender (Schildenfeld) or an over-the-hill Simunic who has only played 3-4 matches since January due to injury. Maybe Bilic gets creative and calls-up a youngster, but I doubt that.
I pray Lovren is ok though, the Cro NT doctor is pretty optimistic that he will be fine but the fact Lovren was crying, stretchered off and today gave an interview saying he can't walk.....I don't see it

I think they are optimistic because the earliest diagnosis thought he was going to be out 6 months but the injury is not that bad. And knowing our luck, he will get injured in training anyway.
Pretty much every tournament we miss one key player: 1998 (Boksic), 2002 (Tudor), 2004 (Pletikosa), 2008 (Eduardo)