Manchester United: Ruben Amorim includes 15-year-old in first-team training ahead of Crystal Palace trip | OneFootball

Head coach getting a closer look at hugely impressive youngster

Gabriel, who turned 15 years old in October, continues to perform beyond his years, having turned out for the Under-18s, and is said to have impressed many behind the scenes this season.

A first-team debut is perhaps still a little while away, but others are in the frame to be given a runout.

Noah Ajayi, Jim Thwaites and Godwill Kukonki, who are all 17 years old, have been working alongside the first-team squad in training recently.

Shea Lacey with Man Utd squad on Monday

Manchester United via Getty Imag

Striker Shea Lacey, 18, as an unused substitute during Monday night's loss against Everton. He could again be included in the matchday squad on Sunday against Crystal Palace, with fellow forwards Matheus Cunha and Benjamin Sesko ruled out.

Amorim has already spoken highly of Lacey, telling reporters recently: "I'm really happy with him.

"He struggled a little bit with injuries, but they did a very good job balancing his body - and you can sense he can manage more load during training.

"He has a lot of talent, but when they come here they can sense the speed is completely different, so they need to spend more time with us to be prepared because our training is hard. In the Premier League games, that pressure is harder, so they need to be ready.

"When you call a kid up to the first team, they need to behave really well.

"This connection is really important. We are putting everything in place - a nutritionist for the academy starts now - in our club. That is something that should be basic.

"All these things we are doing, so I have more time with them and I'm more confident with them. When we put these kids in to play in the Premier League, they will struggle, but will struggle less I think."