Liverpool boss Jurgen Klopp and Fabinho angrily exchanged verbals during Saturday's 3-3 draw with Brighton on Saturday.
Brighton jumped 2-0 ahead before the Reds fought back to lead 3-2 ahead of Leandro Trossard completing his hat-trick.
The Mirror says during the clash, after the Reds had taken the lead, Klopp spotted Fabinho failing to do his job after Brighton had broken dangerously on his team for the umpteenth time.
The Brazilian got it in the ear - and responded by giving his boss a little bit back.
Eventually Fabinho backed down, though left his manager seething as Brighton would eventually equalise and finish the stronger of the two teams.