I watched all the match in the US, the last one between them, when Ljubicic lost. It was a long time since I watched him playing so awfully. As he's playing much better now, I can't see him losing.
Vienna is a good surface for Ljubo, it's about the right speed for him as he is not someone who has compact swings on his groundstrokes, so it gives him enough time in the rallies, but not so slow it negates his serve.
Ljubo is the fave here and that is not such a bold statement, but he will want to win it before it gets to a 5th set.