Barcelona have reportedly drawn up a shortlist of four options to replace Ernesto Valverde, should they decide to sack the under pressure manager.
There have been suggestions that emergency meetings have been called to discuss Valverde's position.
This is despite the Barcelona boss leading his side to back-to-back league titles in his two seasons in charge.
His downfall has been in Europe, where his side threw away two three-goal advantages in back-to-back Champions League campaigns to Roma and Liverpool.
Now according to Catalan radio station RAC1, Valverde is under growing pressure following Saturday's Copa del Rey final defeat by Valencia.
And Mundo Deportivo claim Massimiliano Allegri, Ronald Koeman, Roberto Martinez and Erik ten Hag are the four men being considered as his replacement.
Allegri is available after leaving Juventus and would be tempted by a move to Spain where he would become the first Italian to take charge of Barcelona.
Martinez led Belgium to a third-placed finish in last summer's World Cup and has impressed many La Liga sides.
The former Everton and Wigan boss has lost just three of his 35 games at the helm of the Belgium national side.
Ten Hag has become one of the hottest prospects in management after his sensational season with Ajax while Koeman has the profile the club are looking for after spending six years of his playing career at the Nou Camp.
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youuujjjj mad can't u see he is destroying our team we play poor football he don't build the players confidence against big sides he is to defensive that's why we lost to both Roma an Liverpool he has no confidence in the young players in barca dna we love to play young players he keeps playing rikitic sergi Vidal Suarez jorbi piqua an he never tried continho in midfield in my opinion he don't like those black players never gives malcolm a fair chance keeps playing sergi infront semedo he needs to go to much mistakes our future is not bright with valverge we have young players that should get a chance