has thrown Tyrell Malacia's future at into question, suggesting the Dutch defender may not possess the offensive prowess for a wing-back role in his tactical setup.

Malacia has struggled to leave a mark in recent matches, particularly in forward play, leading to him being substituted at half-time on four occasions post his return from an 18-month knee injury hiatus, including a challenging outing against FCSB at the National Arena last Thursday.

Despite his efforts, Amorim has identified the need for more productive wing-backs and it now appears Malacia could be on his way out of Old Trafford on loan, with Real Betis among various clubs ready to offer him a shot at regaining form and confidence.

Yet Amorim has suggested that if United begins to command more possession, Malacia might find a fit within the back three.

Asked about whether Malacia's future lies at Old Trafford, the United manager explained: "We will see. What I know is that it's really hard on Malacia. It is a long time without playing, and then it's hard to play a lot of games.

"A player like him is a full-back. He played with the national team outside and inside, but sometimes in this system, sometimes it's hard for him because he's not so offensive.

"He can play as one of the three defenders, if we have more possession and more control of the games. It's a really difficult context for him. But he's our player and we are going to help him."

Malacia's path to the first team may be further obstructed by Luke Shaw's return to fitness, who was spotted training at Carrington on Wednesday. Shaw didn't make the squad for the Europa League journey and will also miss the upcoming match against Crystal Palace.

The 29-year-old has endured a torrid year due to injuries and hasn't started for United since February 18 last year, making only three substitute appearances under Amorim in November and December before facing another injury setback. United plan to gradually reintegrate Shaw, with his initial goal being to work on regaining fitness at Carrington.

Meanwhile, his teammates trained in Bucharest on Friday morning after deciding to stay in the city following their late-night Europa League win, which concluded just before midnight local time.

"It will take a little bit more time," Amorim said. "I think he needs to train more, to spend more time with his teammates playing as normal, even small sided games. Not just working alone. He stayed [in Manchester] to do a different type of work. He's going to get together with the team when we arrive [back in Manchester]. And start from there. When I feel it is the right moment, we will start with some minutes in the games."

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