The German coach will remain patient in the belief that a deal can still be done, despite Chelsea announcing that the Holland international is not for sale and will sign a new contract with the Premiership side soon.
Schuster told Spanish television station TVE: "I think we are going to get him and I don't mind if it is in one day, two days or more"
"He is in good shape physically and is doing the pre-season at present .
Drenthe keen to make Madrid move
"It's not a problem if he doesn't arrive for a few more days."
Schuster is hoping Robben will become his fifth signing of the summer, following the arrivals of defenders Christoph Metzelder and Pepe, goalkeeper Jerzy Dudek and Argentine striker Javier Saviola from Barcelona.