Liverpool had to rally from behind to secure a 3-2 triumph at Southampton in the Premier League on Sunday.
The Reds were aware that a win at St Mary’s would place them eight points ahead of Manchester City, who were thrashed 4-0 by Tottenham Hotspur yesterday.
They went ahead in the opening period through Dominik Szoboszlai’s strike.
However, the Saints fought back to seize the lead, thanks to Armstrong’s spot-kick and a counterattack finish from Mateus Fernandes.
But Mohamed Salah netted twice to guarantee Liverpool earned all points.
Arne Slot’s squad will next face City at Anfield next weekend, in what might be a pivotal match for the title race.