Who ya got? And in how many sets?
I think this could swing either way- a lot will depend on Berdych's state of mind and how well Jonas can mix the play up and frustrate Tomas.
That being said, if Tomas can keep his head together, keep the serve very solid as it has been, return well and hit his groundstrokes accurately I think he will take it in 4 sets. Otherwise I can easily see Jonas taking this in either 3 or 4 sets.
EDIT: Sorry for the typo on the poll. The last two options should be Bjorkman in 4 sets and Bjorkman in 5 sets respectively