Manchester United midfielder Marouane Fellaini admits manager Louis van Gaal has introduced a new style of play.
Fellaini said Van Gaal has brought in a different approach to David Moyes which the players had to get used to.
He added: "I agree last season was tough. There was a new manager and it was difficult for all the players but we have another new manager now with a new philosophy and we have to work hard.
"It is about organisation and keeping the ball better. You have to close down when you lose the ball. It is a new philosophy.
"When you bring in a new manager you have to wait because it is not easy to bring in a new philosophy but we are working hard in training. The manager has a lot of meetings to help us improve so we will see what happens in time."
