The Brazil striker's 10th goal of the season in all competitions six minutes from time was enough to seal a 22nd win from 23 league games this season for Jurgen Klopp's runaway leader.

There was something of a setback for the visitor, though, who lost Sadio Mane to injury in the first half.

Jurgen Klopp's side had gone 725 minutes without conceding a goal in the top flight, stretching back to the 5-2 win over Everton in December, until Raul Jimenez cancelled out Jordan Henderson's opener.

It looked as though Wolves would be heading for what would have been a deserved point until Firmino fired home from inside the box, as Liverpool stretched their unbeaten league run to 40 matches.