Bayern Munich face Heidenheim on Saturday as the promoted side have the uneviable task of trying to stop the momentum of the side already vying with Bayer Leverkusen for this season's Bundesliga title. Bayern and a skliful Bayer Leverkusen side coached by former Real Madrid and Liverpool midfielder Xabi Alonso head into the weekend as the only remaining unbeaten teams in the league. Leverkusen, who host struggling Union Berlin on Sunday, head the table with 28 of a possible 30 points, two clear of Bayern in second, with third-placed Stuttgart already five points further back.