Mo Salah, Mane and Roberto Firmino have clearly not been discouraged by relatively modest World Cup efforts and captain James Milner was absolutely magnificent.
Over the coming weeks, however, Liverpool will have to work considerably harder than this.
West Ham, supposedly reborn and remodelled under Manuel Pellegrini, looked desperately familiar, despite the presence of five new signings. The London club defended with too high a line, inviting Liverpool to execute their favourite attacking plays at will. Both Liverpool full backs were able to play like wingers and that pretty much said everything. West Ham did none of these things and never looked like they believed they could take something from the game.