Their brother , tenor Roberto Alagna , performed in the operaâ s premiere in Paris in the summer of 2007 and again in February 2008 in Valencia with Erwin Schrott as part of the Festival international Victor Hugo et Ã gaux 2008 . Their brother , tenor Roberto Alagna , performed in the opera 's premiere in Paris in the summer of 2007 and again in February 2008 in Valencia with Erwin Schrott as part of the Festival international Victor Hugo et Ã gaux 2008 .