The reserve shot-stopper did the trick again for his team, who have never lost in the league when he deputises for the first-choice goalkeeper
Soccerooo Langerak deputised for the injured Roman Weidenfeller at the Westfalenstadion, as the hosts came from behind to pick up all three points.
It was his first start in the league since December 14, a 2-2 draw away to Hoffenheim, and the former Melbourne Victory goalkeeper's ninth Bundesliga appearance without tasting defeat since making his debut in a 3-1 away win over Bayern Munich in 2011.
"They're just numbers," he was quoted as saying by the Bundesliga website.
"Thankfully I have a good team in front of me. They make my job in goal really easy."
Although the 25-year-old conceded it's difficult to be on top form when playing so irregularly, he knows that comes with the territory of being second choice at one of Europe's biggest clubs.
"If you're getting a lot of match practice, it's obviously easier on the pitch," he said.
"But I'm aware of my situation and know I have to be ready to play at the drop of a hat. I was told on Friday that I'd be playing against Wolfsburg on Saturday, so I had one day to prepare."
And Langerak was giving nothing away when asked about the chances of keeping his place for the UEFA Champions League quarter-final second leg at home to Real Madrid on Tuesday.
"I can't say. For the team's sake, I hope Roman recovers by Tuesday," he said.
"It's an incredibly important game for us. Our Champions League adventure isn't over, even if we lost the first leg 3-0. We're always capable of scoring one or two goals, especially at home. We can, and we need to. We'll just have to see what happens."