The altercation stemmed from a controversial decision by Tierney to hand possession back to Liverpool via a drop-ball, even though the hosts had possession before play was stopped due to a head injury to Liverpool defender Ibrahima Konate.
Mark Clattenburg, a former Premier League referee and currently working as Forest's referee analyst, criticised the decision and told BBC Radio 5: "If the referee stops the game, he has to give the ball back to the team in possession. That was Forest."
Tierney mentioned about the incident in his match report and wrote: "Following the final whistle I was surrounded by members of Nottingham Forest's substitutes and backroom staff on the field of play. One of those who approached me was Steven Reid, who was not listed on the teamsheet. He asked me about a decision and I said to him that I would speak to him inside and not outside on the field of play. He then continued to question me and I repeated that I would speak to him inside. He then said, 'It's the same every week, you [expletive]'."