Liverpool made it six wins from six at the start of the Premier League season, holding on to record a 2-1 win over Chelsea at Stamford Bridge.
The visitors opened the scoring through Alexander-Arnold but thought they’d been pegged back by a Cesar Azpilicueta equaliser, only for VAR to rule the Chelsea goal out for offside.
With the hosts still reeling from the overturned decision, Firmino turned in a second to put Liverpool in control.
It looked like Jurgen Klopp’s side would saunter to victory, but a stunning N’Golo Kante solo strike in the second half set up a nervy finish, and Chelsea could have snatched a point in stoppage time, only for Mason Mount to blast over the bar from close range.
Victory keeps Liverpool five points clear of Manchester City at the top of the Premier League table.