Manchester United boss Erik ten Hag was delighted with his young players after their 3-0 win against West Ham.
Alejandro Garnacho scored twice, with Rasmus Hojlund also on the scoresheet for the victory.
Ten Hag said: "It was not easy, West Ham are a good side, but it was a great win for us."
On Garnacho's performance, he said: "It is a time where he has to get used to this position because he prefers a little more left. He is playing now from the right, has some freedom and fluidity in the game where he could find some spaces. He was very good in his attacking, creating and dribbling. I am very pleased with this performance.
"I have said it before in the last couple of months the future for Manchester United is very bright. We have some real high potentials, we can play fluid football, speed it up as we need and defend well.
"The goals today showed young players with high potential. They get used to the Premier League standards. Every game they are growing and improving and adapting to a higher level.
"When they enjoy their football the confidence comes and you can see the belief is growing.
"The celebration I liked it. It is showing we do it together."
On Lisandro Martinez's injury, he added: "I can't tell you detail. We have to find out the next days what the diagnosis. It is very bad, very bad for him and the team. He is just returning. He is very important for us. He brings spirit to the team, aside from his football ability."