Under Diego Simeone, Atleti have won the La Liga title (2014) and reached two Champions League finals — losing both times to Real Madrid — but this season is proving tough for the team.

January brought painful exits from both the Spanish Supercopa and Copa del Rey, while Atletico also fell well behind Real Madrid and Barcelona in La Liga.

On the upside, Atlético have lost only one of their last 25 European home games (and none under Simeone in the Champions League), conceded just one goal in their last 11 home Champions League knockout matches and kept 10 clean sheets in the process.

“If there is a team where you have to be at your best in all departments, it’s Atlético,” Klopp told reporters.

“If you don’t play your very best, you have no chance. [They are] a real, proper machine. They close you down with two or three players, turn you around and counter-attack.”