After going down 1-0 to Swansea City, Jurgen Klopp said Liverpool's sensational triumph over Manchester City last time out felt "like half a year ago".
Liverpool became the first team to defeat Pep Guardiola's side in the Premier League this season with a 4-3 victory at Anfield on January 14, but they were brought back down to earth by Swansea on Monday.
Alfie Mawson's first-half strike proved the difference, with a "frustrated" Klopp unhappy with the application of his players at the Liberty Stadium.
"Last weekend [against City] feels like it was half a year ago, it's not what I'm interested in," he told Sky Sports.