Manchester United are crying out for a natural left winger, who will hug the touchline like Antonio Valencia does on the right.
The Red Devils have always had two out and out wide players, whether they are mazy wingers like Ryan Giggs, who love to dribble past opponents, or David Beckham, who was one of the world's best deliverers of a football.
Manchester United are currently lacking a bit of balance on the left, with David Moyes often having to deploy Shinji Kagawa out wide.
However the Japanese playmaker has a natural tendency to cut inside, which means United do not always have an option on the left wing.
Manchester United duo Nani and Ashley Young are also able to do a job on the left, however the former prefers playing on the right and the latter has been out of form - leaving Moyes with no choice but to dip into the winter transfer market.
Kagawa has been linked with a return to Borussia Dortmund in the January transfer window - with a number of Jurgen Klopp's star players being mooted as potential sweeteners for the deal.
Dortmund trio Ilkay Gundogan, Mats Hummels and Marco Reus have all been linked with a move to Old Trafford, following recent speculation linking Kagawa with a move back to the Bundesliga.
However I think Moyes should keep Kagawa and make a January move for Reus.
Dortmund forked out £15million on Reus and he hasn't failed to live up to his price-tag.
The 24-year-old has scored 21 goals in 44 Bundesliga games for Klopp's side, which is an outstanding tally for a wide man.
Reus played a key role in Dortmund's progression to the Champions League final last season - with the playmaker scoring four goals for his side on their way to Wembley.
He has followed up last season's impressive form by scoring seven goals in 12 league games for the Black and Yellows.
Manchester United have not had someone who can score 10-15 goals from midfield since Cristiano Ronaldo left for Real Madrid in 2009.
Reus, who has a release clause of £29.4m, could be the long-term replacement to the legendary Ryan Giggs.
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