Maresca is clearly a huge fan of Fernandez, having made him Chelsea captain when Reece James was injured, and he played the Argentine in 79 of his 92 games in charge at Stamford Bridge.
Fernandez is by nature a defensive midfielder, but Maresca played him further forward many times last season when Cole Palmer was injured, leading to him scoring a career-best 15 goals.
That means there are several places Fernandez could fit into Maresca’s City team – if a deal does happen.
The Abu Dhabi-owned club also signed England midfielder Anderson from Forest this summer.
Anderson, like Fernandez, has played in various midfield positions – defensive and further forward.
So that would give Maresca some flexibility when naming a team – and means Anderson and Fernandez would be perfectly capable of playing together.
Fernandez’s relationship with Chelsea worsened after the exit of Maresca in January.
In March he criticised the club after a heavy defeat by Paris St-Germain in the Champions League – and then stated his dream was to move to Madrid.
Those Madrid comments led to Chelsea dropping him for two games.
Last month Real Madrid released a statement saying they would not be signing Fernandez – which left City as the only real contenders.
City are interested in other players too for that role, if the Fernandez deal does not pan out.
They include Lille’s 18-year-old Ayyoub Bouaddi, a breakout star of the World Cup for Morocco.
City have also explored a potential move for Bournemouth midfielder Alex Scott, a target for Chelsea as well this summer, and Liverpool’s Alexis Mac Allister.