#3 Jasper Cillessen (Barcelona)
Cillessen only moved to Barcelona two years ago from Ajax, but in that time, he has appeared just two times in La Liga, with his only appearances really coming in the Copa del Rey. He is 29-years-old now, and is approaching the peak of his career, so will want to be playing regular football. Behind Marc-Andre ter Stegen, that doesn’t seem likely if he stays in Spain.
As he isn’t a first choice player at the Camp Nou, Barcelona will likely be open to the idea of the Dutchman leaving the club. Cillessen is a good goalkeeper, not a great goalkeeper, so is less likely to win you points singlehandedly in the way someone like David de Gea does. This may not be as important to Liverpool though, who often go into the match with a tactic of knowing they are always capable of scoring more than the opposition, and will be looking for someone to cut out the howlers. Cillessen will do that.