Liverpool coach John Achterberg and Newcastle United counterpart Daniel Hodges have been charged with improper conduct by the Football Association (FA) following an altercation at the end of last week's Premier League meeting.
Newcastle came agonisingly close to taking a point from last Wednesday's trip to Anfield, only for substitute Fabio Carvalho to strike in the 98th minute, handing Liverpool a 2-1 win.
At the end of a highly charged affair, a member of Newcastle's coaching staff appeared to throw a bottle into the Liverpool technical area, prompting an FA investigation.
English football's governing body have now opted to charge one man from either backroom team, with Achterberg also accused of using abusive or insulting gestures.
"Coaches from Liverpool FC and Newcastle United FC have been charged with breaching FA Rule E3 during their Premier League fixture on Wednesday 31 August 2022," began an FA statement.
"It is alleged that the behaviour of John Achterberg and Daniel Hodges in the 98th minute of that game was improper, and that the Liverpool coach also used abusive and/or insulting gestures."
The two coaches have been given until Thursday to respond to the charges.
Newcastle boss Eddie Howe said last week he had "no idea" why eight minutes of additional time were played at the end of the contest, while Jurgen Klopp suggested Liverpool's winner was the "perfect response" to time-wasting from the Magpies.
Both Howe and Klopp claimed not to have witnessed the bust-up sparked by the bottle-throwing incident after the match.