Youssoufa Moukoko is not a particularly talkative soccer player.

If this teenager, who is celebrated as a child prodigy, has expressed himself over the past few months, it has mostly been via the club's own media from Borussia Dortmund or via his Instagram account.

The striker also used this communication channel on Tuesday, albeit using a number of channels to send a few exclamation marks to the football world.

Moukoko scored both goals in Germany's U-21 national team's 2-1 victory in Poland, and he knows the universal language of the goalscorer even better than the codes and ciphers of social networks.

However, his hashtag "#vertrauenistalles" and his verbally articulated statements after the game attracted more attention.

Because Moukoko made a big promise in professional football a little over a year and a half ago, which has remained unfulfilled to this day.

Now the 17-year-old attacker indicated that he would have liked more appreciation at Borussia Dortmund, where he played 16 Bundesliga games last season, but in which he only played 210 minutes in total: With the U21s he gets " the trust of the coach, he told me from the start: 'I'm counting on you'.

That gave me a lot of self-confidence," Moukoko said in an interview with "Sky" about his relationship with Antonio di Salvo.

If you want, you can read from these words a criticism of the Dortmund coach Marco Rose, who was fired in May, who preferred to let other players storm in most phases of the season.

However, Moukoko has been struggling with muscle injuries, which is why this footballer, who is considered by some experts to be one of the greatest talents on the planet, remains a mystery.

He produced goal after goal in the Borussia Dortmund U-Team and he has scored six goals in four games in the DFB U-21s.

The question remains unanswered as to whether this physically rather small player, who is not one of those filigree dribblers and will probably not grow much further, can assert himself permanently in the more robust adult football.

Or whether he comes up against natural limits here.

In Poland, when asked about his problems in the Bundesliga, Moukoko replied: "I don't think it has anything to do with age, but rather with the different rhythm in professional football, which is very different from that in junior football.

I had to figure that out first.

My body wasn't ready yet.” It sounds as if he believes in a breakthrough soon.

only where?

Dortmund's club boss Hans-Joachim Watzke has just explained that Moukoko must either extend his contract with BVB, which expires in 2023, or leave the club: "Basically" applies if a valuable player is not ready a year before the end of the contract to agree on a longer-term cooperation, "then you have the obligation as a club to sell him."

The trust that Moukoko longs for could be there in the future because he has a close connection to the new coach "Edin Terzic", as Watzke also said.

According to reports, however, Moukoko wants not only trust but also the salary of a seasoned professional.

It is possible that Dortmund cannot or do not want to offer what a post by Moukoko before BVB's last game last season would do: "One last time!

After 6 years with wonderful moments I have to say goodbye.

Thanks for everything.” In any case, Dortmund are faced with a difficult decision: it would be bitter to lose the most hyped teenager in Bundesliga history before he blossoms into his full glory.

It would be just as annoying, however, if they were to drag along a possibly expensive professional who then cannot meet Dortmund's high standards.

Moukoko's goals for the U21s don't make things any easier.