4) Ilkay Gundogan – Borussia Dortmund
The German did sign a contract extension on April, but after recovering well from his injury, United were again linked with a move for his services just before the World Cup. When fit, Gundogan provides an exceptional box-to-box influence for both his club and country, and fits the bill perfectly of what United need in the middle of the park. Like with Strootman though, they could wait until he proves he’s recovered from long-standing injury concerns.