The Teatro Real de Madrid has announced two cast changes for its upcoming production of Wagner’s “Die Walküre.” The company announced that Günther Groissböck will no longer sing the role of Hunding in this production with René Pape replacing him on performances scheduled for Feb. 12, 16, 21, 25 and 28, 2020. Groissböck will be performing “Der Rosenkavalier” in Berlin {…}