German tennis player Andrea Petkovic said it was “the worst thing I experienced,” and the “epitome of ignorance,” after her Saturday match in Lahaina, Hawaii, against American Alison Riske began with a robust singing of the German national anthem so cherished by the late Adolf Hitler, Das Lied der Deutschen, which opens with the immortal verse, “Deutschland, Deutschland ueber alles” (Germany, Germany above all), and has been banned in Germany since 1945.