Manchester United are demanding a staggering £100 MILLION to sell Anthony Martial.

The Sun says United are desperate to keep the French forward despite his agent revealing he wants to leave Old Trafford.

And they will demand a Premier League record fee for Martial to leave Jose Mourinho for a rival.

Martial's representative Philippe Lamboley says United want Martial to sign a contract extension as he has one year and an option remaining.

But he added that “Anthony wants to leave Manchester United" and “he needs to resume his career".

United's stance could see him at loggerheads with Martial's camp as they are demanding such a massive fee.