Opernhaus Zürich has announced a cast change for its performance of “Tosca” on Dec. 20.

The company announced that Vittorio Grigolo will sing the role of Cavaradossi, replacing Jonas Kaufmann who is ill.

Kaufmann also took to social media and said, “as you know, viruses and bacteria are currently running hand in hand everywhere. Now another infection has struck me. With a heavy heart, I have to guard the bed instead of singing Cavaradossi. Stay well, your Jonas.”

Grigolo, who has sung the role of Cavaradossi at the Metropolitan Opera and Wiener Staatsoper, will join a cast that includes Sondra Radvanovsky and Bryn Terfel.

Kaufmann next performs a Christmas concert and a New Year’s concert. He is set to join Ludovic Tézier for a gala in Baden-Baden in January.