It wasn't the 5-0 scoreline that made the statement. Borussia Dortmund would fully expect to stuff a few goals past their Ruhr neighbours Duisburg, who play down in the third division.
No, it was the identity of three of their goalscorers, or more specifically their ages. Jadon Sancho, 20, Jude Bellingham, 17, and Giovanni Reyna, 17, were all on target in Monday night's German Cup rout.
When you add into the equation a certain Erling Braut Haaland, 20, who somehow didn't manage to score, and second-half substitute Reinier, 18, and you're not too far off Dortmund's chosen identity for the season ahead.
Borussia Dortmund made light work of Duisburg in Monday night's German Cup encounter
Jude Bellingham, their summer signing from Birmingham, became their youngest-ever scorer
Brilliant, gifted young tyros and lots of them make Lucien Favre's team an exiting proposition once again as the Bundesliga kicks off this weekend.
Dortmund start their latest quest to steal Bayern Munich's crown with a home fixture against Borussia Monchengladbach on Saturday evening, one day after the champions kicked off their season with an ominous 8-0 demolition of Schalke.
Perhaps the acid test will come in the Super Cup meeting with Hansi Flick's Treble winners on September 30 and certainly in the two rivals' first league encounter at Signal Iduna Park in early November.
Few clubs in Europe rival Dortmund for identifying, scouting and signing talented youngsters. More significantly, nobody matches Dortmund for giving such players first-team opportunities.
Given the abundant crop of youngsters coming through - there's also Ansgar Knauff, 18, Immanuel Pherai, 19, and Youssoufa Moukoko, 15, on the first-team periphery - even Haaland and Sancho suddenly feel like the old guard.
Jadon Sancho opened his account for the new season with an early penalty against Duisburg
Erling Haaland wasn't on target but is tipped for another free-scoring campaign in 2020-21
And spare a thought for 31-year-olds Marco Reus and Mats Hummels, who are pretty much babysitters as they balance things out in the Dortmund team with wisdom and experience.
Favre has his critics but there's been an admirable effort to drive down the average age of the team and the squad. Young players don't simply make up the numbers or fill quotas at Dortmund, they play their full part.
The club is inching towards the close of the summer transfer window on October 5 and that will mean England star Sancho is theirs for another few months at least and most likely a whole season.
Dortmund have played a blinder amid genuine interest in the winger from Manchester United, sticking rigidly to their £108million valuation as the Old Trafford club moan about the financial impact of Covid-19.
There have been suggestions that United are making some headway over the finer details but also reports that they have changed tack towards other right-sided forward targets.
Sancho was all smiles as he celebrated Dortmund's goals as Man United's chances fade away
Lucien Favre will be delighted to retain the services of a player who scored 20 goals last term
Bundesliga unless stated
Saturday Borussia Monchengladbach (H)
September 26 Augsburg (A)
September 30 Bayern Munich (A)
October 3 Freiburg (H)
October 17 Hoffenheim (A)
October 24 Schalke (H)
It helps Dortmund that at no stage has Sancho agitated for a move away. After a phenomenal 2019-20 season of 20 goals and 20 assists in all competitions, he is off and running again with a coolly-taken penalty against Duisburg.
The broad smile on Sancho's face as he celebrated by embracing his team-mates and later congratulated Bellingham on his first competitive goal for the club doesn't indicate a player desperate to pack his suitcase.
For his part, Sancho knows another good season and a positive Euro 2020 with England will only enhance his value and increase his circle of admirers beyond United next summer. Why rush to leave?
Sancho was Dortmund's leading goalscorer in 2019-20 but he was pushed close by Haaland, who scored 16 times despite the handicap of only playing half the