Maresca has been impressed with the versatility of the Argentina international, who can play in multiple positions, including as a defensive midfielder or as an attacking midfielder.

The manager has primarily used Fernandez in an attacking midfield role, where he feels the player excels, but he is also open to experimenting with different formations and game plans.

Maresca believes that Fernandez's ability to adapt to different situations is a key factor in his importance to the team.

However, he also acknowledges that the player's performance can vary from game to game due to the high number of matches he has been playing.

Maresca is confident in Fernandez's ability and is eager to utilize him as much as possible in Chelsea's games.