The reports also claim that Valencia have parted company with Koeman's assistant coaches Toni Bruins Slot and Jose Mari Bakero, as well as sporting director Miguel Angel Ruiz and technical secretary Antonio Fernandez.

Former player and current delegate at the club Salvador Gonzalez 'Voro' is believed to be favourite to take over as caretaker coach of the team, with goalkeeping coach Jose Manuel Ochotorena his assistant.

The apparent shake-up comes after the struggling Spanish giants this weekend slipped closer to the Primera Liga relegation zone following a 5-1 defeat at Athletic Bilbao.

That loss against Athletic was Valencia's fourth successive league defeat and left the team 15th in the standings and only two points above third-bottom Recreativo Huelva with five games remaining.

Those five matches are against Osasuna, Barcelona, Real Zaragoza, Levante and Atletico Madrid.

Los Che have not finished outside the top 10 in the Primera Liga since the 1987/88 season, which was their first back in the top flight after winning the second division title the previous season.

Koeman signed a two-and-a-half-year contract when he joined Valencia last November as the replacement for Quique Sanchez Flores, and although the club's league form has been hugely disappointing, the Dutchman did lead Los Che to the Copa del Rey title last week.