The possibilities for Borussia Dortmund to keep Haaland are not so huge and are not comparable to such clubs as Real Madrid, Manchester City or even Barcelona with all their financial difficulties. Therefore, it is difficult to imagine a scenario in which a player will not leave the club next summer, so Dortmund should make full use of the presence of such a player and already prepare a replacement.
Maybe is not for the time because his agent Mino Raiola has sick. the agreement with (Madrid, City or Barcelona) will continue once he recovers. the last club is his wish (Barcelona), but it's hard because Barca has financial problems, he knows Barcelona will make him be a hero like Messi, that club is not royal to sell players as Madrid did. Regarding substitutes, Dortmund was found the potential player to replace him, Scamacca and Chiesa. but it's still rumors until they finish this session