Brighton boss Graham Potter has explained holding back young pair Moises Caicedo and Michal Karbownik.
Potter insists both youngsters are close to a debut.
“Michal had a slight injury when he came here, which took a bit of time to clear up. He is a young player who has benefitted from being with the group and training with us," he said.
“He needs more time, a bit more game time will benefit him but he's progressing nicely as he develops into a new environment.
“It is a big move for him coming from another country at his age, but he is trying to adapt really well.
“Moises has made a really good impression. Both him and Michal Karbownik are going to play for the U23s in the next few days to carry on that integration and adaptation process into British football.
“It was good for them to be on the bench and get that experience of being around the squad at Old Trafford. We are happy with them, but they need to keep working as well."
