Vasek and Levine are no go's, who is you team?
Milos, Frank and Nestor obviously.
Is Frank or Peter a better doubles player than Shamasdin? I doubt it, Frank will be playing 2 singles, I wouldn't want to tire him out playing doubles but the doubles will be important, why not play Nestor/Shamasdin?
Well then add Shamasdin to the team too.