A host of clubs have expressed an interest in signing the talented 22-year-old, including fellow Premier League side Tottenham Hotspurs.
Martial could secure a transfer away from United sooner than expected after being excluded from the France World Cup squad this summer.
And while Martial's agent Philippe Lamboley assures that United are keen to keep him at the club, he feels the time is right for a change.
The France worldwide has rocked Manchester United after his agent revealed he wants to quit Old Trafford. For now, it's premature to talk about it. Anthony will speak later to explain all of this.
"Manchester United want to extend Anthony's contract and do not want him to leave but we haven't found an agreement despite several months of negotiations". It is a well-considered decision. "However, it is important to remember that he is under contract, Man United have the last word and we will respect the club's decision".
"We do not have the same vision of Anthony's future".
Lamboley said Martial, who joined United for £36m in September 2015, was "disappointed because he has shown his love for the club and the supporters for three seasons".
"However, Anthony got hooked, he showed great professionalism, he was successful".
"I think he has done his best over the last three years". It is important to remember that this season he scored 11 goals and gave ten assists in five months.
But counting in Spurs' favour is the fact that Martial wants to play for Pochettino, while the Argentine tactician is a big fan of the French forward.
Sky Sports have also reiterated reports that Tottenham are poised for a transfer after this week's comments. Everyone will have their opinion, I think he must resume the course of his career.
"I think when the most powerful club in the world does not find an agreement in eight months of negotiations, it is that it really does not want to make an important player a part of its workforce".