He said of the Scotland No1: "Craig was absolutely wonderful last week. He had one incredible save from Saha. I am still trying to work out how he kept that shot out.
"He's the most expensive keeper in British history and I now understand why Sunderland were prepared to pay so much.
"Craig made some great saves and really frustrated us. He already looks a terrific signing.
"To have such a top keeper playing regularly in the English Premiership can only be good for Scotland."