Liverpool U19s coach Barry Lewtas admitted he has spoken to his players after a brawl against FC Porto.
The Reds' youngsters managed a nervy win on penalties at the UEFA Youth League over the Portuguese club's young talents.
However, the game was marred by an incident where Reds forward Lewis Koumas and two Porto players received red cards.
"Whether there was a little bit of antagonizing I don't know," said Lewtas, per the Liverpool Echo.
"It would be really unfair for me to comment. It was a shame the way it went. I could sense from the bench that a few things went against them (Porto) it could go a certain way.
"Sometimes you have 30-odd young boys there and it can spill over. It was a bit disappointing because it looked like the playground a little bit towards the end. And I don't think our performance replicated that.
"Listen, I've just spoken to the players then. We spoke about the way they behave on the way across [from the pitch to the changing rooms]. I think once you do settle down and the emotion comes out, you can behave in a certain way. I think the lads have calmed down and gone in.
"Obviously, I saw what was happening and it wasn't the best scenes but at the same time, I don't know what happened. And I think sometimes when players do run and celebrate at the end of a penalty shootout players can come together."