From an interview with Tagespiegel:
‘I honestly don’t feel like doing six weeks of rehearsals anymore. Three and a half must be enough for an opera, especially for operas that I have already sung elsewhere. Also, in the heavy Verdi repertoire that I’m now singing, I can’t do a lot of acting.
‘If a director tells me: Please lean to this side while singing – you can’t. When the hip is bent, the windpipe is also bent. With the aria “D’amor sull’ali rosee” from the “Trovatore” I must not move, or the air won’t flow properly, and then: basta! It’s about perfect breath control.’