The Premier League champions raced into a three-goal lead, thanks to strikes from Naby Keita, Trent Alexander-Arnold and Gini Wijnaldum.
Olivier Giroud pulled one back for the Blues before the break.
However, Roberto Firmino headed Liverpool into a 4-2 lead ten minutes after the restart.
Although Tammy Abraham pulled one back, Alex Oxlade-Chamberlain had the final word.
When asked specifically about his Kepa’s performance, Lampard told reporters after the match: “I wouldn’t talk about individuals in a game where we conceded goals which are some real quality Liverpool finishes, particularly the free-kick.
“There were some individual errors. Ee contributed to a very good game. We know where we are at.”
