And Mata believes the youngsters are adding a new energy to the squad.
"We are happy the manager is using youngster because it is the philosophy of the club and there are many youngsters coming through the academy,” Mata said.
“After the goal it was easier to play because they are more open. 1-0 was enough.
"Chris Smalling and Daley Blind have played well together in the whole season and we are very happy with our defenders.”
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