(Credit: Alexey Kostromin) Polish soprano Ewa Płonka has withdrawn as the cover for Anna Netrebko’s Lady Macbeth at the Teatro alla Scala’s season opener. Płonka will also not sing the final performance in Verdi’s operatic masterpiece on Dec. 29, 2021. “Friends, due to personal reasons I will not be taking part in Macbeth production this December in La Scala but {…}