Jurgen Klopp was involved in a heated altercation with Villarreal defender Juan Foyth after Liverpool's Champions League victory on Wednesday evening.
Klopp's side will take a 2-0 lead to Spain for the second leg of their semi-final after an own goal and a Sadio Mane strike. If Liverpool reach the showpiece event in Paris, it will be their fourth major European final since the German was appointed in October 2015.
Shortly after the game, Klopp was seen briefly arguing with Foyth. Reserve goalkeeper Adrian was forced to intervene and reason with the former Tottenham defender, who made 12 Premier League appearances during his time in England.
