Madrid lost 1-0 at home to Real Betis on Wednesday, despite creating 27 chances, to fall seven points behind Barcelona.
Jeremy Mathieu says Neymar left Barcelona to step out of Lionel Messi's shadow and has more chance of winning the Ballon d'Or at PSG.
On Thursday, Atletico announced that they had reached an agreement with Chelsea for the return of the Spain international for an undisclosed fee.
Atletico Madrid's Koke has warmly welcomed back Diego Costa to the club but believes he will need to fight for a starting place.
Chema Rodriguez scored an early contender for goal of the season as Levante eased to a 3-0 victory over 10-man Real Sociedad in La Liga on Thursday.
With Diego Costa sealing a move back to Atletico Madrid, the FC panel discuss the impact the striker will have come January.