The centre-forward, who has three goals to his name this term, was injured in the win at Everton earlier this month and has been sidelined ever since.
However, he has been working on his return and our photographers captured him out on the Carrington pitch with his team-mates, as the side started preparations for Thursday's game at Real Sociedad.
Martial will hope to feature again soon, and manager Erik ten Hag is likely to provide an update in Wednesday's press conference, in advance of the Europa League tie, which kicks off at 17:45 GMT.
The Frenchman has featured four times this term, and made at least one goal contribution in each of those appearances, with assists versus Liverpool and Everton.