Despite the uncertainty surrounding his club future, Pastore believes Fernandez has remained fully focused on Argentina's World Cup campaign.
Pastore said: "Right now, the player is focused on the national team. He's playing in a World Cup, and they're very close to reaching the round of 16.
"He's doing well, very positive, he's having a great World Cup. In the first two matches, he helped the team win comfortably. Enzo has changed his position a lot in recent years. He's played deep or as a midfielder getting forward into the box. Here with the national team, he starts deep, but ultimately he's the only midfielder who gets forward and is close to Messi. He's a player who adapts very well to any position."