Bayer Leverkusen sporting managing director Simon Rolfes said that the Bundesliga champions are on their way to achieving great things, but that “many people underestimate our huge potential.” “It’s no longer the Bayer 04 Leverkusen from 15 years ago. Bayer 04 are the number one in the Rhineland (region in Germany) and we are an international advert for our region. We see that in all areas and the double season was obviously a boost to this development,” he said in an interview published on the club’s website on Wednesday. “In the next few years we have a huge chance to achieve a much higher l…