Warnock, who is a former Liverpool defender, claims that Alexander-Arnold struggled individually to recapture the same kind of brilliant form he's shown for much of this season.
"We need to be a bit more savvy next time and hopefully the referee can see through it as well".
Saul Niguez's scrappy goal in the fourth minute got Atletico off to an ideal start in a fervent atmosphere at the Wanda Metropolitano but Klopp was unhappy with some aspects of Diego Simeone's side's play.
"We put in a decent performance and we know we can be better".
There are a small army of Liverpool supporters who believed the German was totally out of his depth during Tuesday night's encounter. and that it is time for him to step down. "There were a lot of situations, I think after 30 minutes three Atletico players were on the ground, they weren't even injured. Atlético very obviously were here to squeeze a result out of this game and against that our pressing was exceptional, our buildup was outstanding, our counter-press was exceptional", Klopp added further in the interview. That's always been a problem.
Adrian stressed that nothing is lost for Liverpool yet and at Anfield they can turn around any result as they did when they beat Barcelona 4-0 last season in the semi-final after losing 3-0 at the Nou Camp. I think we handled it quite well to be honest, them falling over quite easy. If it had gone 2-0 I think Liverpool would have been almost out.
"We speak about Anfield and the power a stadium can have, and tonight we saw it".
We've got a couple of weeks, we've got Premier League business to take care of. "And for all the Liverpool fans that can get a ticket - welcome to Anfield".