After reaching the finals of last season's Champions League, Borussia Dortmund were brought back down to earth in their opening fixture of this campaign. And the German giants will look to put that particular blip behind them when they host Marseille at the Westfalenstadion on Tuesday.
Napoli's 2-1 win will still be causing Jurgen Klopp a few palpitations, after the Dortmund manager saw his side go down to ten men early on following the sending off of goalkeeper Roman Weidenfeller.
Klopp also won't be a part of the game on Tuesday night, after the enigmatic German was shown a red card by the referee for raging at the fourth official.
"It really wasn't on," Klopp said expressing his disappointment at the way he acted in Naples. "I won't even forgive myself for that, and it's not something you can just forget about so easily.
"You've got to be punished for things like that, and that's totally fine. I'll follow it from high up and will at least get something out of the game, being a good view.
"Missing one game on the sidelines is not a major thing. If they'd removed me from the training ground for a week before, then that would have been worse to be honest."
Dortmund lost both their matches in the group stage to Marseille a couple of years ago, but Klopp feels this side is a much more mature team than the one that struggled so much in 2011-12.
"I have already told a colleague today that you cannot buy experience," Klopp said. "You have to earn it and we've earned ours. Two years ago we played good football and lost by a surprisingly big margin, especially in Marseille and then we lost here as well. We have a little bit of a feeling that revenge is in the air. Not a lot, but a little bit."
Marseille fell to a 2-1 defeat at the hands of Arsenal in their first Champions League game this season, making the trip to Dortmund a lot more important as well as daunting.
"We have potential in our team which we should be able to call upon," Marseille manager Elie Baup said. "We should not think too much about how the game might develop but try to make the best of it. In this competition, you can learn a lot.
"As we all know, there are six group matches. We played the first of those, performed quite well, but unfortunately did not get a result. Tomorrow (Tuesday) it continues and we have to enjoy playing in the Champions League."
Team News: Along with Klopp, Weidenfeller is also suspended, with Marcel Schmelzer, Sebastian Kehl, Ilkay Gundogan and Lukasz Piszczek all ruled out through injury. Sven Bender, though, is available for the Marseille encounter.
Marseille were dealt a blow with striker Andre-Pierre Gignac ruled out through a toe injury. Benoit Cheyrou and Jeremy Morel also miss the game.
Key Men: Borussia Dortmund: it's hard to look beyond Robert Lewandoswki, who set the Champions League alight with his goals last season. Marco Reus was also in amongst the goals in the Bundesliga at the weekend and will cause problems to the Marseille defence.
Marseille: Mathieu Valbuena was quite impressive against Arsenal and the diminutive playmaker will need to be at his best again, if the French side are to get a positive result against Dortmund.
Where to watch
The match is scheduled for a 12.15 a.m. (IST, Wednesday) start with no live telecast scheduled.
Expected lineups: Borussia Dortmund: Langerak; Grosskreutz, Subotic, Hummels, Durm; Sahin, Bender; Aubameyang, Mkhitaryan, Reus; Lewandowski.
Marseille: Mandanda; N'Koulou, Mendes, Mendy, Fanni; Romao, Imbula, Valbuena; J. Ayew, A. Ayew, Payet.
Prediction: 2-1 to Dortmund