Manchester United youngster Kobbie Mainoo will not appear in a behind-closed-doors friendly this week.
The 18-year-old was expected to take part in a training game to build up his fitness.
However, The Mail states that Mainoo is not yet ready to take part in a full game.
United are managing the central midfielder, as they do not want him to suffer a serious setback.
One who may be back very soon is left-back Sergio Reguilon, who is on loan from Tottenham.
United took on Barnsley behind closed doors on Tuesday in a bid to give fringe players a runout.
