BERLIN – With runaway leaders Bayern Munich involved in Saturday’s Club World Cup final, their Bundesliga rivals Borussia Dortmund and Bayer Leverkusen will be aiming to trim the Bavarians’ lead.Munich hold a seven-point lead at the top of the table and are threatening to again run off with the title, unless their rivals can steal a march with Bayern in Morocco.Second-placed Bayer Leverkusen face Werder Bremen away on Saturday with the hosts winless in their last five games."It won’t be easy for us but we want to make a good impression in our last match before the winter break and take all three points,” said Bayer coach Sami Hyypia.Leverkusen can set a new club record of 40 points for the first half of the season with a win at Bremen on what will be the final Bundesliga weekend of 2013.But Bayer slumped to a shock defeat at the hands of strugglers Eintracht Frankfurt last weekend and Bremen plan to follow suit.Third-placed Borussia Dortmund, who are 12 points behind Bayern and five adrift of Leverkusen, host Hertha Berlin looking for only their second league win in five games.