New Manchester United interim manager Ralf Rangnick will "shake things up" at the club, according to Dimitar Berbatov .
After his work permit issues cleared on Wednesday, Rangnick was in the stands watching on as Cristiano Ronaldo scored twice to see off Arsenal at Old Trafford in caretaker Michael Carrick's third, and final, game in charge.
Carrick left the club as Rangnick took over, citing a desire for time away from the game, and departs the Reds with two wins and one draw.
Rangnick won't have to wait too long to be in front of a roaring Old Trafford crowd as Crystal Palace visit the Theatre of Dreams on Sunday, and will oversee his first training session ahead of the game.
Dimitar Berbatov believes the 63-year-old will be looking to set the mark immediately as he enters the first days of his six-month deal which could see a 'shake up'.
"Rangnick is now in charge and being in the stands last night watching the match will have given him a clear idea of how the team should play and how it should be structured," he told Betfair.
"It will take some time for him to properly get to know the players, how they think, talk and behave. But first of all, he will have a clear idea of how the team should play, and I expect they will start on that straight away.
"I saw his press conference and I heard that he is keen to sort out the defensive form. We know United are conceding too many goals and it shouldn't be like that. He will want to correct that straight away."
He continued: "Rangnick knows his statistics and he will be working on that every day with the team. I expect the defence will be his top priority.
"German football is very strict and managers in the Bundesliga like discipline, they know exactly what they want. If the players don't get on board with that, follow the rules or don't fit in his tactical way of thinking then they won't be involved.
"Every time a new manager comes in they have players they like and don't like. I'm expecting him to shake things up a bit and if that means some players will get left out that will be the case, they all have to prove their worth to him and get in line with his way of football."
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