With the Bundesliga set to commence once again following the international break, all eyes will be on Bayern Munich and returning head coach Jupp Heynckes.
The 72-year-old, who won the treble during his last spell at the club, has largely been seen as a shrewd appointment by the German champions, but there's something still disconcerting about Bayern this season.
A humbling at the Parc des Princes against PSG was the final nail in Carlo Ancelotti's coffin, with the Italian parting ways with Bayern at the end of last month. The fact that few teams could have coped with the destructive precision of Kylian Mbappe and Neymar was irrelevant. At Bayern, the bar is always set high: it doesn't matter who the opponent is, a 3-0 defeat is impermissible.
Record signing Corentin Tolisso, who arrived from Lyon in the summer for €41.5m, looked helpless in the centre of midfield as £400m worth of Mbappe and Neymar tore through them at ease, posing the question as to whether Bayern Munich's lack of spending in the summer cost them against a club who certainly did invest.
Star hitman Robert Lewandowski caused a commotion earlier in the season when he told Der Spiegel, via Marca: "Bayern need to do something to bring in more world class players. If you want to be competitive then you need players of this quality.
"Until now Bayern has not spent much more than 40 million on a player and that figure is more or less the average in the transfer market."
The Polish striker seemed irritated with a perceived lack of spending at Bayern. His fears that he will never win the Champions League in Munich may continue if the club refuse to engage in the worst excesses of the transfer market.
But it isn't just the defeat to PSG that signifies a difficult spell in Munich. They currently sit second in the Bundesliga, five points behind league leaders Borussia Dortmund. The departures of Phillip Lahm and Xabi Alonso last season were the start of an ageing exodus that will soon include the likes of Frank Ribery and Arjen Robben, who are now well into their thirties. The backbone that has made Bayern so successful over the past five or six season is slowly disappearing, and that means the start of a slow transition period for the German champions.
And so to begins. The second tenure of legendary coach Jupp Heynckes is merely to buy time as they enter into a cloud of uncertainty. It's desperation territory; the lowest common denominator if you will.
The atmosphere will be one of optimism at the Allianz Arena when they host Freiburg on Saturday, but the rest of the season will be spent trying to hold off the realisation that their position at the peak of world football isn't guaranteed; not until they reinvent themselves with an entirely different project for the future.