Shinji Kagawa has once again been linked with a potential transfer back to Borussia Dortmund.
Manchester United playmaker Kagawa moved to Old Trafford from the Bundesliga outfit during the summer of 2012, with Jurgen Klopp disappointed to see such a valuable and immensely popular member of his first-team squad depart.
Now, according to the latest speculation from The Daily Mail, Dortmund are once again considering launching a move to bring the 25-year-old back back to Signal Iduna Park prior to the close of the transfer window.
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Any pursuit of Kagawa could prove difficult for Klopp, however, with the same source suggesting that La Liga outfit Valencia are also keen on signing him, with the Japanese international also believed to have been mentioned in initial negotiations as Manchester United step up their protracted pursuit of Juventus enforcer Arturo Vidal.
Manchester United's transfer activity has appeared to kick into somewhat of a higher gear in recent days, both in terms of incomings and potential outgoings.
With Marcos Rojo having already moved to Old Trafford in a part-exchange deal that saw ineffective winger Nani return to Sporting Lisbon on a season-long loan, the Red Devils also moved to complete a £59.7 million British record swoop for Real Madrid midfielder Angel di Maria earlier this week.
Louis van Gaal seems keen to follow up that particular signing with more arrivals prior to Monday's deadline and it also seems likely that a number of his current players will be shortly moving on to pastures new.
As well as Kagawa's links to several European sides, Wilfried Zaha - who did not even manage to make an appearance during Manchester United's 4-0 humiliation at MK Dons on Tuesday night - is poised to join Crystal Palace on a season-long loan deal following Neil Warnock's appointment as the Eagles' new manager on Wednesday.
Unlike Zaha, Kagawa did feature in the Capital One Cup defeat at the hands of Karl Robinson's League One promotion hopefuls, although he lasted just 20 minutes at Stadium MK before a head injury forced him to be replaced by Adnan Januzaj.
Despite remaining a popular figure among certain section of Manchester United's support, Kagawa's short career in English football has not proved wildly successful, despite the fact that he won the Premier League in his very first season on these shores.
His influence at the club was radically reduced under David Moyes and it appears that he is unlikely to enjoy more of a prominent role under Van Gaal.