5) Roberto Firmino (Hoffenheim to Liverpool – £29m)


The Brazilian is not a conventional forward by any stretch of the imagination, and he was initially utilised as a winger by Liverpool boss Brendan Rodgers. However, after the arrival of Jurgen Klopp, he was used more centrally.

Playing as a deep-lying forward, he combined extremely well with Mo Salah and Sadio Mane to create a lethal front three which has reached two Champions League finals and lifted the Premier League title.