#3 Julian Weigl (Borussia Dortmund)

The young German is one of the most highly-rated midfielders in the Bundesliga. At the age of 22, he has made quite a name for himself with eye-catching performances for Dortmund over the past few seasons.
Weigl plays the crucial role of being the pivotal figure between attack and defence. He boasts a passing rate of 86.2% and considering his age, he's likely to improve upon that figure in future.
His fellow countryman, Toni Kroos has already tipped him to be a world-class player in the future. He is very good in his positioning, which helps him influence games - equally capable of sitting deep and dictating play from less advanced positions in midfield. He provides good cover for his teammates and he has displayed fantastic off-the-ball movement.
Though the Red Devils are likely to face competition from their local rivals Manchester City for him, they should definitely consider signing him as a replacement for Carrick.