Postecoglou's Spurs side managed an impressive 2-1 home win over Liverpool on Saturday.
The game involved many controversial moments, but one that flew under the radar needed Postecoglou's quick action.
Spurs striker Richarlison and Reds boss Jurgen Klopp were involved in a row on the toucline.
Per football.london, the two went back and forth as Richarlison was fuming at Klopp.
Postecoglou eventually went over to ensure that his Brazilian striker did not get into any trouble.