#2 Jasper Cillessen (Barcelona)
In 2016, Barcelona signed Jasper Cillessen from Ajax as a direct replacement for their out-going goalkeeper, Claudio Bravo.
However, in the subsequent two seasons, the Dutchman made a total of just 21 appearances for the Catalan club. Surely, that's not enough game-time for a player of his calibre.
Much to Cillessens' frustration, Marc Andre ter-Stegen became Barcelona's first choice goalkeeper after Bravo's departure.
While Ter-Stegen started in all the La Liga and Champions League games, Cillessen started in the domestic competitions.
At 29 years of age, Cillessen must be on the look-out for regular first-team football next season. Earlier in the transfer window, he was being linked with a move to Liverpool and now that the Reds are close to signing Alisson, it's time for Chelsea to step in for the Barca GK.
At Ajax, Cillessen won the player of the season award for two consecutive years. Available for approximately £30 million, he would be a good player for Chelsea to bring in at this stage.