Leverkusen's match with Leipzig will be tough. Leverkusen seems to be performing less than last year. So of course they can be contenders for the championship but I don't expect an undefeated championship like last year. They may probably suffer defeats this year in this race with Bayern but it is obvious that they are under great management with Xabi. It seems like it will be better this year.
Bayer Leverkusen have not shown that they will be champion this season. It might be too early to judge them but they have struggled to get wins from low-placed teams. They were not impressive against Borussia Monchengladbach and also struggled to beat fourth-division FC Carl Zeiss Jena in the first round of the DFB-Pokal. Coach Xabi Alonso would have to find means to make his team create and also maximize opportunities. The game with Champions League side RB Leipzig will be a good test to show how the team is improving. Leipzig also has three points in the Bundesliga after edging over VfL Bochum scoring one goal and conceding none. Leverkusen will be without captain Lukas Hradecky but hopefully will do a good job.