Ancic/Ljubicic beat Bryan bros, so I think Kas/Petzschner have not much chances to beat them.
It will still be the beginning of season, surprises are possible, but I think it's not going to happen.
Ljubicic can beat both Kiefer and Haas, and Ancic can beat at least one of them. I'll be happy with 3-2 victory.
We'll know who was right in 2 months.