Earlier this week, the orchestra announced that Andrew Davis, the music director of the Lyric Opera of Chicago, would replace Barenboim in the CSO's season-opening concerts this weekend. The CSO has also postponed a recording session with Barenboim and violinist Nikolaj Znaider that was scheduled for September 15 and 16.
Barenboim's next planned appearances with the CSO are October 21-24, when he is scheduled to play the piano in a program conducted by Antonio Pappano and give a solo recital; a week later, he is to lead a program featuring soprano Deborah Voigt. The CSO did not say whether he is expected to recover in time for those concerts.
Robertson completed a term as the music director of the Orchestre National de Lyon earlier this year, and is the music director designate of the St. Louis Symphony.