Ten Hag’s decision for Martial to train on his own is not a disciplinary matter, but reflects his belief in individual training for players lacking match fitness.

Martial is currently not deemed to be fit enough to work with the first-team group at present given the intensity and work-rate the manager demands from his players in training.

Anthony Martial is training away from United’s squad as he continues to recover from illness

Erik ten Hag has given little away about the Frenchman’s absence since early December 2023

A number of United players suffered from a sickness bug last month. Marcus Rashford missed United’s final Champions League group game against Bayern Munich after being struck with the Norovirus, but returned a few days later to play in the goal-less draw against Liverpool.

Individual training for players returning from injury is standard practice at United, but the length of time it is taking Martial to regain fitness has raised eyebrows.

Martial is out of contract at Old Trafford at the end of the season and is expected to leave on a free transfer, as he has not been offered a new deal.

United would listen to offers for Martial during the current window as off-loading his £250,000-a-week wages would give them greater scope to sign players whilst complying with Premier League spending rules, but the player is believed to want to stay and fight for his place.

Martial has failed to live up to his potential since he became the most expensive teenager in the Premier League when United paid Monaco £36million for him nine years ago, but has still scored 63 league goals 149 starts.

Martial has failed to live up to his potential at Old Trafford but Ten Hag still regards him as an important member of his squad