Liverpool had to come from behind to claim a 3-2 win at Southampton in the Premier League on Sunday.
The Reds knew that victory at St Marys would take them eight points clear of Manchester City, who were humiliated 4-0 by Tottenham Hotspur yesterday.
And they took the lead in the first half through Dominik Szobozslai.
However, the Saints fought back to take the lead, thanks to Armstrong’s penalty and a breakaway goal from Mateus Fernandes.
But Mohamed Salah scored twice to ensure Liverpool took maximum points.
Arne Slot’s men will now face City at Anfield next weekend, in what could be a decisive fixture in the title race.
EPL table: Liverpool open eight-point gap after 3-2 win at Southampton