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I think there is no need for Haaland when there is Mbappe. Having so many star players in the team also has its disadvantages. The demands of the players can be very high, and each player can spend every position generously to stand out. I think they can finish this transfer season with a very good defender instead of Haaland and an excellent player instead of Kroos.
It is very unlikely that Real Madrid will recruit Haaland after they succeeded in bringing in Mbappe, after all these two players cannot be played at the same time because they play in the same position. It's enough for Real Madrid to bring in a quality striker, what is needed now is all in Mbappe.
Real Madrid front line is very complete, they also have quality reserve players who can play in the same area. Real Madrid may bring in one or two more players before the transfer window closes, but it is certain that the player they will bring in will not be a striker because it is no longer their priority.