Roberto Firmino's first-half goal proved decisive as Liverpool earned a 1-0 away win at Tottenham Hotspur that gave them a record start to the season.
Both sides started strongly with Alex Oxlade-Chamberlain shooting against the post, while Son Heung-min fired narrowly wide.
Virgil van Dijk might have given Liverpool the lead, but his header from Jordan Henderson's cross was well saved by Paulo Gazzaniga.
Liverpool broke the deadlock on 37 minutes, Firmino latching on to Mohamed Salah's pass to rifle home.
Spurs improved in the second half and might have levelled late on had Son not blazed over or substitute Giovani Lo Celso been able to steer Serge Aurier's cross past Alisson.
The Reds' 12th successive league victory takes them 16 points clear at the top on 61 and represents the best-ever total after 21 matches of a top-flight season.
Spurs drop to eighth on 30 points.
Spurs: 18 Jan v Watford (A)
Liverpool: 19 Jan v Man Utd (H)
Referee: Martin Atkinson (pictured). Assistants: Lee Betts, Constantine Hatzidakis. Fourth official: Andre Marriner. VAR: Craig Pawson. Assistant VAR: Harry Lennard