epa06110393 An undated handout photo made available by Bayreuther Festpiele (Bayreuth Festival) on 24 July 2017 shows Swedish baritone John Lundgren in the role of Wotan and tenor Andreas Conrad in the role of Mime during a photo rehearsal of Wagner's opera 'Siegfried' at the Bayreuth Festspielhaus (Bayreuth Festival Theatre) in Bayreuth, Germany. The opera opened the Bayreuth Festival on 25 July. EPA/ENRICO NAWRATH HANDOUT (ATTENTION EDITORS - MANDATORY CREDIT: 'Photo: Bayreuther Festspiele/Enrico Nawrath/epa' INTERNET USE ONLY UP TO A MAXIMUM SIZE OF 800 x 800 PIXELS HANDOUT EDITORIAL USE ONLY/NO SALES) HANDOUT EDITORIAL USE ONLY/NO SALES HANDOUT EDITORIAL USE ONLY/NO SALES