In his first concert as BSO Music Director, Andris Nelsons conducts excerpts from operas by Wagner, Puccini, and Mascagni, featuring soprano Kristine Opolais and tenor Jonas Kaufmann, as well as Wagner's Tannhäuser Overture and Respighi's The Pines of Rome.(Some emphasis added.)
That BSO page also has a link to an interview with the maestro and a preview of the concert, as well as the broadcast schedule for the upcoming season.
The concert begins with the Tannhäuser Overture and ends with the Respighi, with the singing in between. The BSO's own performance detail page lists all the selections which are to be sung. There are the usual links to background information.
Since this concert was only given on that Saturday evening, there were no reviews to link when I wrote my preview at the time. Here's a link to a lengthy review in the Boston Musical Intelligencer. The reviewer liked most of what he heard but groused about the choice of pieces and the intrusions of PBS's cameras and lighting to record the show for television. He also tells about the encore: "O soave fanciulla" from La Bohème.
As usual, the concert can be heard on air or over the web from WCRB (link above) at 8:00 Boston Time. It should be enjoyable.