Bayer Leverkusen dropped eight points behind league leaders Bayern Munich after a scoreless draw at Wolfsburg on Saturday, setting up a potentially season-defining duel between the top two next weekend. Bayern's 3-0 win over Werder Bremen on Friday, their seventh straight league win, increased the pressure on Xabi Alonso's defending champions, who host the leaders next Saturday. Alonso named a weakened starting lineup with Florian Wirtz, Patrik Schick and Jeremie Frimpong all left on the bench after playing 120 minutes in Tuesday's extra-time German Cup win over Cologne.