AS says Felix is fed-up with his status under Atletico coach Diego Simeone and doesn't believe his game is suited to the Argentine's system.
Instead, the Portugal international is ready to make a transfer request and leave next month.
Inside Atletico's board room, such a sale would be welcome, where the club's moneymen are under pressure to balance the books.
Felix joined Atleti almost three years ago for a club record €127m and the LaLiga champions would be reluctant to accept any major discount on that original price.
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