In 2014, Jurgen Klopp's side endured the worst opening half of the Bundesliga season in Borussia Dortmund's history. Coming off their worst ever "Hinrunde" -- first round -- in the Bundesliga, Borussia Dortmund entered the winter break with plenty to work on before the competition resumes on Jan. 31. Here are five observations from their final friendly -- a 1-1 draw with Fortuna Dusseldorf -- before the Bundesliga restarts. 1.