Bayer Leverkusen’s Bundesliga Invincibles started training for their final two tasks of the season on Monday while sporting director Simon Rolfes is busy planning the future. Leverkusen are the first team to go through an entire Bundesliga season without a defeat for their maiden league title, and they are also yet to lose in the Europa League and the German Cup, where they face Atalanta on Wednesday and Kaiserslautern on Saturday in the finals. The Atalanta match in Dublin will be Leverkusen’s third European final, having won the Europa League under its previous name UEFA Cup in 1988 against …