The diva was first to announce it on her Facebook page:
“It is with great sadness that I inform you that I must unfortunately withdraw from the upcoming European performances of Ariodante on tour with Harry Bicket and The English Concert. Good news for YOU is that the incredible Alice Coote has made herself available to fill in … details in the video. I am, however, still able to do the American portion of the tour and very much look forward to revisiting this incredible role. PS – I’ll be fine! :-))”
The Barbican followed up with:
It is with deep regret that Joyce DiDonato has announced that she will not be able to participate in the European performances of Ariodante with Harry Bicket and The English Concert due to a medical procedure. She is immensely sorry to disappoint her fans and admirers but is hugely grateful to the wonderful Alice Coote for stepping in for the European concerts, and to Harry Bicket and The English Concert for their support and understanding. Joyce is looking forward to singing the American tour dates.
A cyst op, apparently.