That is according to reports in France that claim that the attacker hesitates to join the Red Devils.
Martial no longer has a contract in June 2020 and has yet to sign a new deal with United.
RMC Sport The leaders of Old Trafford are keen to tie the 22-year-old and know that several other clubs want to sign him.
Martial delivered the final time-out against Newcastle in the 3-2 comeback victory.
"You never get consistency or a series of performances, which is frustrating"
Man Utd legend Paul Scholes
And the attacker will hope that his performance was good enough to secure a starting place against Chelsea in the Premier League tomorrow afternoon.
Manchester United legend Paul Scholes has opened up to Martial and his best position on the side of Jose Mourinho.
He told ESPN: "On the left, but it is hard for him and Rashford to gain some confidence because they come for a game, they may not have the best game and then they are out for three or four matches.
"If the team does not play well, they are returned for an hour and then excluded.
"You never get consistency or a series of performances, which is frustrating."
Mourinho has also revealed that he has a fully fit team tomorrow for the trip to Chelsea.
"The squader form is that everyone is available," he said.
"[I had] a little bit of everything [in the international break]. We work here with the players who stayed here. I went to an international competition [in Serbia] as you know.
"Then we came back and we waited for the boys to come back from their national teams.
"Some came back in good shape and good luck with some good results, some came back with injuries, injuries we knew when they happened and the national teams were right when they sent the boys back.
"We also had surprises with players that we had no idea that they had been injured and that they had been badly injured."
Starsport you will bring the full coverage of Chelsea vs United tomorrow, starting at 12.30.