Liverpool boss Jurgen Klopp says facing Atalanta will be "tricky".
Atalanta are at Liverpool tomorrow for the first-leg of their Europa League quarterfinal.
Klopp said: "Playing against us can be like going to the dentist as well, to be honest. That is what Pep said about coming to Atalanta.
"They are a consistent team but every player has different skillsets. We are expecting them to be super organised and they are very experienced.
"It was three and a half years ago, but we are not the same team from that time either. There has probably been about 1500 games in that time.
"So I cannot compare to the team we played that long ago but it will be a tricky game for both teams."