#1 Diego Costa, Atletico Madrid

Though Atletico Madrid are well and truly in the race for the 2018/19 LaLiga title, the form of Diego Costa is arguably the biggest worry for Diego Simeone. The Los Rojiblancos are in the third place in the 2018/19 LaLiga standings, just a point the table-toppers Barcelona.
However, Diego Costa is yet to get off the mark in this campaign. The Spaniard's only goal this season came against Monaco during matchday one of the UEFA Champions League campaign. The 30-year-old striker hasn't scored a goal since September and was awfully poor in front of goal.
Diego Costa holds the key to Atletico Madrid's title hopes this season and Diego Simeone would want his star striker to rediscover his golden touch before it is too late.