Ryan Giggs has been tearing people apart since 1991. To put that in perspective, Jack Wilshere was just a twinkle in his father's eye.
One of, if not the greatest player to have played in the English Premier League, Giggs is the most decorated Premier League player. Having shown no signs of his age slowing him down, the reality is Giggs will be 38 in November, and will want to quit while he is on top.
In a similar situation as Edwin Van der Sar, Sir Alex will want his prized winger to retire while the world remembers him for being the best.
At times this season United have lacked creativity in the middle, and depth out wide. The return of Park Ji-Sung and Antonio Valencia have been a major boost for Uniteds title push, however Manchester United need a young player who can play through the middle, just as well as out wide.
A player, more importantly, who can pick the lock of opposing defenses.
Wesley Sneijder is a start, but he does not possess the speed needed to replace Ryan Giggs, and is a better replacement for Paul Scholes. Eden Hazard is class, but the young Belgian international is at the top of most clubs wish list and will come with a hefty fee. Alexis Sanchez was strongly linked with a move to United after his World Cup performances for Chile, but a deal failed to materialize.
It appears that Manchester City are going to go on another £200 million spending spree after qualifying for the Champions League, and it is believed that Sanchez is a top target of the Eastlands club.
Ashley Young is well suited to the role Manchester United would need him to fill, but at 26, with a high transfer fee and with Liverpool emerging as favorites to land the English winger, United will likely miss out.
At 22 years old, and a likely transfer fee of £16.5 million, Marko Marin fits the bill. Regarded as the German "Messi," Marin's 5'7" stature allows him to drift in-between players in a similar manner as Lionel Messi.
While playing for Werder Bremen this season, Marin has had to adapt to a more central attacking role—the position that Mesut Özil deputized before his transfer to Real Madrid. Typically more comfortable on the wing, Marin has excelled playing through the middle and has set up chances and scored a few goals along the way.
Marko Marin is an extremely gifted player, with loads of potential. He has already proved that he can hold his own in a physical league similar to the EPL, but his game requires an added level of maturity if he wants to elevate his play to the next level.
The German international suffers from the same setback that many young talented wingers experience. Knowing when to dribble, and when to release the ball. Sir Alex has experienced many players with Marin's skill set, with similar issues in holding onto the ball to long.
One needs to look no further than Luis Nani. Full of skill and potential, it was not until this year that Sir Alex and his staff groomed Nani into one of the greatest wingers playing in the EPL. Nani's game has developed from step-overs and feints, into numerous assists and an improved eye for goal.
Under the guidance of Sir Alex, and the chance to train with some of the greatest players in the modern game, Marko Marin could develop into a phenomenal all around talent. Marin is a very raw talent, but has the skills to become a great finished product.
Under the tutelage of Sir Alex, Marin could very well become the next great winger if United do indeed move for the German play-maker.