Liverpool Assistant Manager Pako Ayesteran is set to leave Anfield after a series of disagreements with manager Rafa Benitez.
The Anfield No. 2 is understood to have left club on immediate leave after matters between the two men came to a head yesterday afternoon.
It is understood tensions between the pair - who have been close colleagues for the last decade - have been brewing for several months.
Matters finally reached a critical point at the Melwood training ground yesterday when it's understood Ayesteran indicated he was longer interested in working for Liverpool.
It is understood he will officially leave the club shortly once administrative issues around his contract are resolved.
A series of disagreements are believed to have contributed to the break-up of the partnership.
Ayesteran has had full control over the training and preparation of the squad and there were alterations made during pre-season which led to the disagreements.
It is not believed Ayesteran has an alternative offer under consideration.
However, he was linked with Athletic Bilbao during the summer and Liverpool supporters will be hoping rumours of interest from Manchester United and Chelsea in Ayesteran's services are no more than speculation.
Benitez will now have to begin the process of replacing a man credited with much of the background work behind a successful rebuilding of Liverpool.
Ayesteran is know for his skills in technical and physical areas, including fitness techniques and sports science.
The back room staff which Benitez brought with him when he arrived from Valencia three years ago has now effectively broken up, with former coach Paco Herrera and goalkeeping coach Jose Ochotorena also recent departures for entirely different, amicable reasons.