Philadelphia Orchestra music director Yannick Nézet-Séguin will be replaced in this week's Kimmel Center and Carnegie Hall concerts by Michael Tilson Thomas.
An orchestra spokeswoman said Nézet-Séguin was suffering from sinus problems and had been told by his doctor not to travel. This is the second Carnegie Hall date he will have missed this season; the first was the hall's season-opening gala last month, cancelled due to a stagehands' strike.
In another switch, guest pianist Helene Grimaud has requested a change of program from Brahms' Piano Concerto No. 2 to his Piano Concerto No. 1.