Manchester United have told Anthony Martial he is not for sale.

Despite the player's frustration and negotiations over a new contract proving difficult, Martial has been informed he can forget about leaving.

Le 10 Sport says United management regard Martial highly and still believe he can fulfill his potential in a Red shirt.

The France attacker comes off contract in June, but United intend to trigger the 12-month option in the current deal if they cannot find a new agreement with his management.

For his part, Martial is frustrated over his situation - though reluctant to formally table a transfer request.