Bayer Leverkusen’s Bundesliga Invincibles started preparing for their final two tasks of the season on Monday while sporting director Simon Rolfes was busy planning the future. Leverkusen are the first team to go through an entire Bundesliga season without a defeat, and they are also yet to lose in the Europa League and the German Cup, where they face Italy’s Atalanta on Wednesday and Kaiserslautern on Saturday in the finals. No European team has ever gone through a season unbeaten in all competitions since continental matches were introduced in the mid-1950s. Leverkusen’s unbeaten run stands …