4) Arturo Vidal – Juventus – Likely cost – £35m
The final piece in the midfield jigsaw, potentially. Vidal would provide the side much needed energy and dynamism, as well as work-rate and goals. Alongside a defensively minded player like Daley Blind, and Ander Herrera or Angel di Maria in a more creative role – the balance would be perfect in a three man midfield.