#1 Luis Suárez (FC Barcelona)
Explaining why Suárez has been so bad in the Champions League is something that is difficult to explain.
Like a lot of other big stars in La Liga, the Uruguayan had a slow start to the season but has recovered in the league and is now third on the scorers' chart behind Messi and Ronaldo.
In the UCL, his performances have ranged from the forgettable to the downright pathetic (see both legs of the quarterfinal against AS Roma for evidence for his Jekyll-and-Hyde performances).
Manager Ernesto Valverde's tactics have not helped El Pistolero as more often than not, he is left to forage on his own as the other midfielders usually try not to drift too far forward and maintain the team's defensive shape. This has left Suarez isolated as he is now almost completely reliant on Messi carrying the ball forward to meet him or on pullbacks and crosses from the fullbacks.
Suárez himself has not been at his agile. pesky best as defenders in Europe have found it easier to deal with him. His tally of 1 goal and three assists is shocking for a player of his quality and he will be eager to make amends in next season's competition.