4. Luiz Gustavo (Bayern Munich)
There’s undoubtedly plenty of Bayern Munich players Fergie would dearly love to get his hands on but one man who could realistically be available to improve United’s squad is Brazilian defensive midfielder Luiz Gustavo. The 25-year-old has been unable to hold down a regular spot in the Bavarian’s incredible first team this season and would add both class and steel to the middle of the park for the Red Devils. The Selecao star can also cover at left-back – useful versatility given Patrice Evra is not getting any younger.