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.
One reason Dortmund has not been exceptional after most seasons is in their practice of selling off their star players, because they make more money from that maybe it makes up for the trophies they have been unable to win, because I have not heard of them having financial struggles too often like I hear with other teams. If they keep Guirassy this season for aa reason, he my be sold next season except they keep having more good reasons to keep him.