Berlin: Arjen Robben has admitted that Bayern Munich are some way from their best form as they head into what he says is a must-win game for the Bundesliga champions at Freiburg on Saturday.

The Dutch winger said that he and his teammates needed to be “self-critical” as they bid to return to the top of the Bundesliga this weekend.

Bayern are two points behind leaders Borussia Dortmund, who have been plunged into an injury crisis ahead of a tricky trip to Wolfsburg, and have the chance to overtake Dortmund ahead of their face-to-face next week.

Bayern Munich may have won their last four games, but both coach Niko Kovac and his players know that they need to improve when they host Freiburg.

“We’re not playing our best football at the moment,” Arjen Robben said this week, after watching his teammates labour to a 2-1 cup win over fourth tier side Roedinghausen.

“We need to win against Freiburg, maybe we can take another step forward and gain confidence before we play Dortmund the week after.”

Kovac will have to do without in-form midfield maestro Thiago, who tore an ankle ligament against Roedinghausen.

Leaders Borussia Dortmund, meanwhile, are facing a defensive crisis as they look to keep Bayern at bay with a win in Wolfsburg.

With Manuel Akanji, Lukasz Piszczek and Marcel Schmelzer all out injured, things went from bad to worse when Abdou Diallo limped off the field early in Dortmund’s 3-2 cup win over Union Berlin on Wednesday.