Luis Enrique could be working through his final season at Barcelona.
Enrique's deal expires in June and he has suspended talks over a new agreement.
Spanish expert Guillem Balague, who is close to Barca, told Sky Sports: "The feeling on his arrival in Barcelona was that three years was going to be enough.
"We will have to wait to see if he has changed his mind because he said he will talk to the club about his future at the end of the season.
"If so, then I would say that Ernesto Valverde of Atheltic Bilbao is a possible substitute. There is also a possibility that Juan Carlos Unzue, who is number two at the club, can be his replacement."