Bundesliga preview: Heavyweights collide as Bayern host Dortmund

League leaders Borussia Dortmund may blood Mitchell Langerak for their away trip to Bayern Munich on Saturday in the Bundesliga.

Australian goalkeeper Langerak, 22, is in line for his German top flight debut after first-choice gloveman Roman Weidenfeller suffered a knee injury at training, with the club to make a decision on Friday on who will stand in goal at the Allianz Arena.

The first-versus-third battle is deemed to be the final chance for Bayern to make inroads into Dortmund’s seemingly unstoppable surge towards the Bundesliga crown.

The reigning champions, who trail Juergen Klopp’s side by 13 points in the league standings, will be keen to use the momentum from a midweek Champions League victory over Inter Milan to halt the Dortmund juggernaut.

Borussia Monchengladbach have a chance to climb off the bottom of the standings when they travel to fellow strugglers Wolfsburg on Friday.

Monchengladbach racked up a confidence-building 2-1 victory over mid-table Schalke over the weekend and take their battle for survival to the Volkswagen Arena.

Wolfsburg are in freefall having lost their past four in the league to sit level on points with relegation-placed Kaiserslautern and just four above Monchengladbach.

Caretaker manager Pierre Littbarski has overseen his side score once in the 180 minutes he has been in charge since former boss Steve McLaren’s sacking.

Kaiserslautern welcome seventh-placed Hamburg on Saturday, the hosts desperate for points to hurl them to safety, while the visitors will be looking for a win to maintain their push for a European place.

Mainz will be hoping to break a two-game losing streak when they travel to Hoffenheim, while Cologne host Freiburg at the Rhein Energie Stadion.

St Pauli welcome fourth-placed Hannover on Saturday, while in-form Schalke 04, chasing a fifth straight league victory, host Nuremberg.

On Sunday, Eintracht Frankfurt host fellow strugglers Stuttgart, and Werder Bremen look to shoot clear of the relegation zone when they welcome second-placed Bayer Leverkusen to the Weserstadion.