The striker intends to hang up the boots at the end of this season.
"His decision to leave football came at a difficult moment for the team," Fernandes told the agency Lusa.
"Now however things are going well and I hope he will reconsider. I would like to see him back out there on the pitch next season. It's strange to think he might leave at the end of the season.
"Losing a player of his class and quality really would be a blow.
"With his experience his is an important reference point for us players.
"He helps us and gives us advice. Even when I wasn't playing much he helped me learn how to shoot and helped me study goalkeepers' positions."