Arsenal boss Mikel Arteta played down the incident between Granit Xhaka and Liverpool defender Trent Alexander-Arnold during Sunday's 2-2 draw.
Many say the bust-up sparked Liverpool's fight-back after the visitors had jumped to a 2-0 lead.
But Arteta says: "I don't know if that's the case. We had a big chance after that. If we'd scored to make it 3-0, maybe the crowd doesn't get too excited but after that, they scored a goal and that changes the momentum and the hope. But still, we had to come in the second half and we had to play more and that's the lesson.
"The lesson is 'Stick to what we've done the first half'. Play with our personalities and that's the way we have to continue to play. If we do that, we'll win a lot of games.
"When you concede at the end, you always focus on dropping two points because you have it and you are suffering but you are relying on certain moments and the feeling is 'Ah, we should have done it!' But being fair to ourselves, they had four big chances where they could have scored and they missed the penalty. We will have to look at ourselves in the mirror and we should have done much better in the second half."