Liverpool's Champions League title defence got off to a stuttering start as Jurgen Klopp's Reds fell to a 2-0 defeat against Napoli on Tuesday night.
Returning to Stadio San Paolo - where they lost 1-0 in the group stages last season - Liverpool fell behind with nine minutes remaining from the penalty spot.
Dries Mertens stepped up and fired in from the spot after Jose Callejon went down under a challenge from Andrew Robertson.
With time running out, Virgil van Dijk made an uncharacteristic mistake to tee up former Tottenham forward Fernando Llorente for a simple finish to wrap up the game.
Relive the action with David Lynch in Naples!
Napoli: Meret, Di Lorenzo, Manolas, Koulibaly, Rui, Callejon, Allan, Fabian, Lozano, Mertens, Insigne
Subs: Llorente, Elmas, Maksimovic, Zielinski, Ospina, Ghoulam, Milik
Liverpool: Adrian, Alexander-Arnold, Matip, van Dijk, Robertson, Henderson, Fabinho, Milner, Salah, Firmino, Mane
Subs: Wijnaldum, Lovren, Gomez, Oxlade-Chamberlain, Lallana, Shaqiri, Kelleher
Referee: Felix Brych (Germany)
