Liverpool appeared to be on course to win 4-3 when James Milner put them ahead 15 minutes from time, only for Sebastien Bassong to equalise with a superb 20-yard drive two minutes into injury time.
However, substitute Lallana – who had earlier set up Roberto Firmino to draw Liverpool level at 3-3 – had other ideas, as his perfectly controlled left-footed volley bounced into the ground and over Declan Rudd to settle an incredible game and spark delirious Liverpool celebrations.
Meanwhile, Manchester United’s hopes of mounting a serious Premier League title challenge were dented yesterday, as Charlie Austin scored on his Southampton debut to earn a 1-0 win at Old Trafford.
Austin, playing his first game for the Saints, came off the bench 11 minutes from time and headed home James Ward-Prowse’s free kick on 87 minutes to earn Southampton their second league win at Old Trafford in two seasons.
Despite the Anfield win sparking hopes of an assault on the title, Van Gaal’s side again started slowly with few chances to speak of in another forgettable first half for Old Trafford supporters — save for a mouse seen running up and down the touchline.
Leicester City’s adventures continued as Jamie Vardy rediscovered his goal-scoring touch in a deserved 3-0 victory over Stoke that thrust them to the top of the table.
Vardy, unstoppable earlier in the season, had gone six league games without a goal but struck with a brilliant effort mid-way through the second half, latching on to Danny Drinkwater’s pass and rounding goalkeeper Jack Butland to slot the ball into an empty net.
Drinkwater had earlier put Leicester ahead with a rare goal just before halftime, but substitute Leonardo Ulloa finished the rout with an 88th- minute tap-in to send the King Powr Stadium into deliriium.The win sees them move three points clear of Arsenal who could reclaim top spot if they beat Chelsea today.
Meanwhile, Watford returned to winning ways with a 2-1 win over Newcastle United at the Hawthorns.
Odion Ighalo struck in a pass from Troy Deeney in the 46th minute, before providing the assist for Craig Carthcart in the 58th minute.
Later in the game, Lascelles converted a Jonjo Shelvey corner, but, by then, the game was beyond the Magpies and the Hrnets had returned to the top 10 of the EPL.