Kylian Mbappe has alerted a number of top European clubs by informing Paris St-Germain chiefs of his desire to leave at the end of the season.The Times are reporting that Mbappe, whose current PSG deal expires in 2022, has set his sights on a move away from the Parc des Princes in order to further his career.The France superstar is said to be eyeing up a move to either La Liga or the Premier League - and Manchester United are one of the sides on his radar.But considering he joined PSG in a deal worth £165million two years ago, how would United be able to afford Mbappe?If they identify Mbappe as a serious transfer target next summer, United would first need to offload one of their most valuable stars to balance the books.Selling either.
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