Dig out your flared trousers, dust off your disco LPs and don your Gunter Netzer wig. Borussia Monchengladbach are hosting Bayern Munich this Saturday afternoon, and the Bundesliga is bracing for a 1970's nostalgia-fest.
As Bayern have rampaged to seven consecutive German league titles in recent seasons, many a neutral has yearned for the halcyon days of forty odd years ago, when Netzer's swashbuckling Gladbach side were a worthy rival to the brilliant Bavarians. In eight years between 1970 and 1977, Borussia won five titles to Bayern's three.
Now, the good old days may well be back. Ahead of Saturday's showdown, Bayern are stuck in fourth with their iron grip on the title under threat. Marco Rose's Gladbach, meanwhile, have been top of the table for two months and are fast becoming the story of the season.
Three points this weekend would see Gladbach pull seven points ahead of Bayern, and cement their status as serious title contenders. As club legend Berti Vogts put it: 'If they beat Bayern, it will be very hard to knock them off spot.'
Vogts, a central figure in that iconic 1970's Gladbach side, said this week that he sees similarities between the current crop and the heroes of yesteryear.
'We also used to want to get forward all the time. We always believed we could win, and always wanted more,' he told Rheinische Post newspaper.
This season's Gladbach side certainly have something of that under new boss Rose. There have been a handful of meagre performances, but at their best, Rose's side have been a furious attacking force who have swept aside minnows and top-six rivals alike.
Not many would have predicted such an impressive start to 2019-20. If Bayern's rule was under threat this season, then it was Borussia Dortmund and Julian Nagelsmann's RB Leipzig who were considered the main challengers.
Gladbach, by contrast, were a club under a cloud as recently as last spring. Coach Dieter Hecking had been shown the exit door, and in the last ten games of last season, his side managed just two victories, both of them against opponents doomed to relegation.
Having spent a decade establishing themselves as a breeding ground for young talent and perennial top-four candidate, Gladbach suddenly seemed to be on the verge of a crisis.
Fears of an implosion proved unfounded. Sporting director Max Eberl has long been linked to Bayern Munich, and in the summer of 2019, he reminded everyone why. His first coup was to land Red Bull Salzburg boss Rose, and he followed it up with a string of astute signings, all of whom are now firing on all cylinders.
Up front, new arrivals Breel Embolo and Marcus Thuram have linked up brilliantly with fellow French speaker Alassane Plea, scoring 15 goals between them in the league so far.
Thuram, the son of former Juventus and Barcelona defender Lilian, has been a particular revelation. The 22-year-old has played himself into the hearts of the Gladbach faithful with four assists and six goals, two of which came in the derby against Dusseldorf.
Another newcomer, Ramy Bensebaini, has managed to unseat beloved veteran Oscar Wendt at left-back, and with good reason. With the Algerian's tenacity and Wendt's experience, Gladbach are yet to concede a goal from their left flank this season.
Rose's high-intensity brand of football and tactical flexibility have also been crucial, even if he and his side remain a little green when it comes to life at the top level.
Amid the euphoria there have also been some sobering performances. Gladbach have lost to both Leipzig and Dortmund, and two weeks ago, they were humiliated by promoted side Union Berlin, who are making a habit of terrorising top-six opponents.
With that in mind, Saturday's clash with Bayern is also a chance for Gladbach to prove they are more than just a flash in the pan. It is an opportunity which Rose intends to grab with both hands.
'We are the league leaders, we won't make ourselves smaller than we are,' he said on Thursday. 'I am convinced that we can beat Bayern.'
Comments like that are music to the ears of Gladbach fans, who are already singing about the Bundesliga title.
It would be their first title in 42 years. Their first since the glory years of Netzer, Vogts, Bonhof and co. Their first since those halcyon days when there was only one Borussia who could stick it to Bayern Munich.