Motherwell were given the opportunity to score an away goal in the 56th minute after Guga tugged Sutton's shirt in the box as Flamurtari tried to defend Hammell's free-kick.
Westermann's header from a Bastian Schweinsteiger free-kick flashed past James' post, then the Germans needed to defend well to thwart promising moves involving Wright-Phillips and then Agbonlahor.