Shinji Kagawa
New manager will decide Kagawa's future.Reuters

Shinji Kagawa's future will be decided once Manchester United appoint their new manager, although the playmaker is unlikely to return to the Bundesliga, his agent has revealed.

Having struggled to impose himself on the starting XI at Old Trafford following his move from Borussia Dortmund in 2012, the Japanese international's future at the club has been under scrutiny with the possibility of a return to the Westfalenstadion often mooted.

The imminent arrival of Louis van Gaal will spark a summer shake up at United with the Dutchman expected to make changes to the side who recorded their worst ever Premier League campaign in the 2013/14 season.

After an inauspicious two seasons at the club there have been suggestions that Kagawa may be one of the casualties in the expected clear out this summer. However the 25-year-old's agent has indicated there is little chance of his client leaving the club, although they must wait to learn of the new manager's intentions before a decision is made.

"Shinji will go to the World Cup and then we will see what the new coach plans at Manchester United," Thomas Kroth told German magazine Kicker. "At the moment it is unlikely that he will be leaving the club in the summer."

Kagawa, whose contract at United runs until 2016, remains highly thought of by Dortmund boss Jurgen Klopp who has previously criticised United's tendency to play him in a wider role.

Dortmund defender Mats Hummels has also been vocal in his support for his former teammate, recently telling the German press the club would welcome back the playmaker with open arms.

However, Dortmund CEO Hanz-Joachim Watzke has questioned the logic behind resigning the player, given the options the club currently have in his position.

"We have worked with Marco Reus as a no. 10 and we have Henrikh Mkhitaryan, who can also play in that role," Watzke said last month. "Would then a third 10 still make sense?"