The Belgian moved to Strasbourg from Premier League partners Chelsea to €8m.
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The wing-back has shone in Ligue 1 and L'Equipe says Premier League interest is already arriving.
Strasbourg are prepared to sell and expect to make a healthy profit with an asking price set at €20m.
Strasbourg coach Gary O'Neil recently said: "There's no reason why he shouldn't go very far, especially at a club aiming for the Champions League title.
"I'm pushing him to be more consistent throughout the match. He brings energy, he works hard both defensively and offensively. Physically, he's impressive."