I initially thought that after Dortmund acquired Guirassy, I thought Dortmund would sell him for a high price in this season's transfer window. This made me wonder if Dortmund had a good plan this season, keeping him to achieve something. I have a feeling that if Dortmund retains some of their best players without selling them, the team will pull off a few surprises this season.
Guirassy performed exceptionally last season, but not many clubs were interested in him, so Dortmund didn't sell him. It's different with Haaland and Bellingham, because both players had such opportune moments that many clubs were interested in them. I think because there weren't any big offers that matched Dortmund's wishes, they didn't let Guirassy go this season. If Dortmund received a big offer in the next transfer window, I'm sure they would let him go. If they were planning to develop the team, they would have already signed several players in the transfer window, but Dortmund didn't do anything.