Mistakes from Andrew Robertson and Virgil van Dijk proved costly as the reigning European champions fell short to Napoli at the Stadio San Paolo.
This is their first loss over 90 minutes this season as the other defeat came at the hands of Manchester City on penalties during the Community Shield.
Jurgen Klopp has his work cut out for him sorting out his defense ahead of a run to win a consecutive European title this year.
