JURGEN KLOPP warned Atletico Madrid that they face a torrid European night at Anfield.
Liverpool were left fuming by refereeing decisions and Atletico’s antics in the 1-0 defeat, with boss Klopp booked for dissent after berating the fourth official.
Saul Niguez’s fourth-minute winner made for an unhappy return to the scene of Liverpool’s June Champions League triumph.
Asked about atmosphere Atletico can expect in the return on March 11, Klopp said: “Welcome to Anfield — it is not over yet.”
The Reds failed to manage a single shot on target for only the second time in 251 games under their German boss.
Klopp added: “You need a really strong ref. So many things happened. They had three players on the ground for a little breath.
They had three players on the ground for a little breath. Sadio Mane was targeted, that was clear
“Sadio Mane was targeted, that was clear. He played a good first half but all they wanted to do was get him a yellow card. That is why I took him off.
“But I deserved my yellow card.”
Rival boss Diego Simeone whipped up the home fans during a defeat which leaves Klopp without an away win against Spanish rivals in SEVEN games.
Andy Robertson accused Atletico players of going down too easily and felt his team should have been given a throw-in before Atletico’s goal.
The Scottish full-back said: “We gave them the best possible start, then they could start falling over. They celebrated like they had won the tie.
“The throw-in before the corner should have gone to us so the officials made a mistake.
“They were falling over easy but we got on with it and we are better than that.
Liverpool were dealt a further headache when skipper Jordan Henderson was subbed off with a hamstring problem.
Klopp added: “I hope it was a precaution but I am not 100 per cent.”