Real Madrid Transfers: Will PSG break an unwritten rule by keeping Kylian Mbappe?

Real Madrid Transfers: Will PSG break an unwritten rule by keeping Kylian Mbappe?.

Real Madrid want to sign Kylian Mbappe, but PSG will not sell him this summer. That's not an issue for Florentino Perez, but it could be a problem for PSG.

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