Ravel completely reworked his idea of "Wien" into what became "La valse", which was to have been written under commission from Serge Diaghilev as a ballet. However, he never produced the ballet. After hearing a two-piano reduction performed by Ravel and Marcelle Meyer, Diaghilev said it was a "masterpiece" but rejected Ravel's work as "not a ballet. It's a portrait of ballet". Ravel, hurt by the comment, ended the relationship. Subsequently, it became a popular concert work and when the two men met again during 1925, Ravel refused to shake Diaghilev's hand. Diaghilev challenged Ravel to a duel, but friends persuaded Diaghilev to recant. The men never met again. The ballet was premiered in Antwerp in October 1926 by the Royal Flemish Opera Ballet, and there were later productions by the Ballets Ida Rubinstein in 1928 and 1931 with choreography by Bronislava Nijinska. The music was also used for ballets of the same title by George Balanchine, who had made dances for Diaghilev, in 1951 and by Frederick Ashton in 1958.