Cologne - Another irresistible weekend of Bundesliga action has come to an end and once again there were incidents aplenty around the top-flight grounds.

With that in mind, outlines five of the major talking points to emerge from Matchday 9 in the most unpredictable league in world football.

BVB fans were once again left stunned after their side succumbed to a sixth Bundesliga defeat of the campaign, this time against Hannover 96, that leaves them down in 15th place, just three points off the bottom. It is the first time the club have lost half a dozen games in the first half of a season under Jürgen Klopp. "We had four or five clear-cut chances but just didn’t put the ball in,” the tactician said. Kloop will need to find a solution quickly, as Dortmund travel to FC Bayern München on Matchday 10.

Pep Guardiola's (r.) expression said it all during FC Bayern's match away to Gladbach on Sunday: he was worried - and rightly so. The Bavarians dominated the first half but struggled to break down their compact hosts and were then on the ropes after the break, unable to deal with the Foals' swift gallops forward. Better finishing and a less-inspired Manuel Neuer would have surely led to a first defeat of the season. There's hope for Dortmund - and the league's chasing pack - yet...

Goals? Check. Red card? Check. Comebacks? Check. Late drama? Check. Eintracht Frankfurt versus VfB Stuttgart truly had it all, providing a blink-and-you’ll-miss-it spectacle for the fans packed into the Commerzbank Arena. The lead changed hands three times before the visitors recorded their first away win since November 2013, returning home with a 5-4 victory. Incidentally, Frankfurt striker Haris Seferovic’s expulsion late on was the 2,000th sending off in Bundesliga history.

Just 15 minutes before the bulk of the Matchday 9 matches kicked-off on Saturday afternoon, Werder Bremen announced their decision to part ways with head coach Robin Dutt and appoint Viktor Skripnik (r.) as his successor. Bremen's 1-0 defeat at home to 1. FC Köln on Friday proved to be the final straw, with the club at the very foot of the table having earned just four points so far this season, their worst start ever to a top-flight campaign.

With the headlines being dominated by the unbeaten runs by top the two, as well as Dortmund's domestic nosedive, VfL Wolfburg have managed to creep up the table almost unnoticed and settle into third place. The Wolves' 3-0 win over Mainz was their fourth consecutive league victory, and continued their undefeated start to the campaign at home. Boasting a large squad filled with quality and a dazzling array of attacking talent, Dieter Hecking's charges increasingly look like a force to be reckoned with.

Check out more stories from Matchday 9 on the Bundesliga's official YouTube channel: