#3 Naby Keita (Liverpool)

Having agreed a deal to sign him in the summer of 2017, Liverpool had to wait a year to get their first sight of Naby Keita in a red shirt. Unfortunately, he never really proved his worth and was seen as a bit of a flop, particularly after Liverpool paid around £50 million for his signature.
He started just 16 games in the Premier League all season, scoring only two goals, and never really earned himself a sustained spell in the side.
The Guinea midfielder struggled to adapt to Premier League football, failing to deal with the physicality of the English game and forcing Jurgen Klopp to favour a more dynamic midfield.
The 24-year-old also picked up an injury towards the end of the season, meaning he missed the Champions League Final and then looked short of fitness at the Africa Cup of Nations. He is fully fit now, and must make the most of the chances he gets next season.