Bundesliga, Week 22 preview and fixtures: Schalke host Mainz in Friday's showcase

Mainz will try to keep up with the Europa League challengers when they visit Gelsenkirchen. The big games in the Bundesliga this weekend take place in Gelsenkirchen and Wolfsburg. Friday features Schalke hosting Mainz at the Veltins Arena. Saturday's showcase has Bayer Leverkusen visiting the Volkswagen Arena to face Wolfsburg. Schalke will be targeting their fifth straight win to start the Rückrunde when Mainz come to town on Friday evening. Somehow... Someway... Jens Keller has figured out ho...