Playing todayHoffenheim vs FC Augsburg 16:30Wolfsburg    vs    M’gladbachHertha        vs    Hannover 96Schalke 04    vs    MainzLeverkusen    vs    StuttgartHamburg SV    vs    Bayern     19:30 Playing on SundaySC Freiburg    vs    Bremen     16:30    K’lautern    vs    Cologne    18:30    BERLINThe Bundesliga will try to warm up football fans in Germany this weekend as the race for the title heats up in freezing conditions.None of the nine fixtures is expected to be played in temperatures above zero, but the fans who brave the cold snap can expect entertainment as a four-horse race for glory intensifies.Borussia Dortmund have won their last three games in a row, Schalke have tasted victory five times in succession and Borussia Monchengladbach have lost only once in their last nine games.That streak includes a 3-1 win over current league leaders Bayern Munich, who have seen their advantage at the top of the table reduced to just four goals over Dortmund and 12 over Schalke. Gladbach are a point further behind.On Friday night Dortmund (were) at Nurnberg. Schalke host Mainz on Saturday afternoon with Gladbach heading to Wolfsburg, while Bayern are the last of the big four in action in Hamburg on Saturday evening.Gladbach should also not be discarded as title candidates, according to one of the most famous members of their dominant side from the 1970s, Gunter Netzer.Behind the top four, Werder Bremen and Bayer Leverkusen remain separated by just a point in the race for a place in the Europa League following their draw last weekend.