Musical chairs at ‘Tosca’

The Metropolitan Opera’s new staging of Puccini’s “Tosca” has run into more bumps.

Spokesman Peter Clark said baritone George Gagnidze sang Scarpia in the first act Thursday night but was feeling congested and acted the second while Carlo Guelfi sang from the side of the stage. Gagnidze sang Monday’s opener of Luc Bondy’s production after the Met said Juha Uusitalo withdrew because of illness.

Clark said music director James Levine missed Thursday’s performance because of a back ailment and Joseph Colaneri replaced him.

The production debuted Monday on opening night of the Met season and the production team was booed when it appeared for curtain calls. The dark staging replaced an opulent Franco Zeffirelli production that had played at the Met since 1985.