Mohamed Salah moved level with Steven Gerrard as Liverpool's top goalscorer in European Cup and Champions League history on Wednesday morning (AEDT).
Salah netted a stunning breakaway goal early in the second half against Atalanta as the Reds tore the Serie A side apart.
That strike, a composed left-footed finish at the end of a rapid burst forward, was the Liverpool number 11's 21st in the Champions League proper for the club.
Salah therefore tied Gerrard's all-time benchmark.
Salah, who reached the 2018 final in his first season at Anfield and won the competition the following year, swiftly teed up a fourth Liverpool goal for Sadio Mane.
Diogo Jota had scored twice before the break and completed his hat-trick – his first in Liverpool colours – as Jurgen Klopp's side moved 5-0 up after just 54 minutes.