Eintracht Frankfurt wrote their name in the history books after a 2-1 win over Nurnberg made them the first-ever promoted team to win their first four games in a row.
Bayer Leverkusen, TSG Hoffenheim and Hamburg are the other three teams to have been defeated by unfancied Eintracht so far as the yo-yo club look to keep their place in the top flight.
Goals by Erwin Hoffer and Japanese starlet Takashi Inui helped Frankfurt to victory at the home of a team who, until then, had been undefeated.
Afterwards, coach Armin Veh was full of praise for his team, who not only had to replace injured striker Oliver Occean but also captain Pirmin Schwegler early in the match.
"It took a quarter of an hour to get into the match," Veh said. "Then we had to take a rabbit punch with Schwegler's and Occean's injuries. It usually does not help a team, but what they did after that... If I wore a hat, I'd take it off to them." Veh, who helped VfB Stuttgart to their last Bundesliga title in 2007, must now prepare for a showdown against Borussia Dortmund on Tuesday.
"It's going to be a lively battle," midfielder Sebastian Rode said. "We've shown that we are capable of many things. We have had a great run, and we will play for those three points against Dortmund."
Martin Laning, who could replace Schwegler if he does not recover from a cut to his head in time for the match, said the players were approaching games "with a lot of self-confidence".