Brendan Rodgers’ side moved up to sixth place, within two points of fourth-placed Manchester United, as goals from Philippe Coutinho and Raheem Sterling secured their sixth win in their last seven matches in all competitions.
But fifth-placed Southampton had reason to feel aggrieved after a trio of penalty claims were turned down in the first half, starting in the opening moments when Emre Can tugged at Filip Djuricic.
Coutinho responded by lashing Liverpool into a third-minute lead with a brilliant long-range strike that streaked into the top corner for the Brazilian midfielder’s first league goal since November.
Djuricic’s second penalty appeal came when he appeared to be fouled by Joe Allen, but again referee Kevin Friend ignored his appeals.
Then Can handled in the penalty area as he tried to control before clearing a cross, yet once more Friend waved play on.
Liverpool took advantage of more good fortune to seal the points in the 73rd minute when Southampton’s Matt Targett slipped while trying to clear and the ball fell perfectly for Sterling to slot a deflected shot past Fraser Forster.
“I call it unlucky in the decisions of the referee. The second situation is a clear penalty to Filip Djuricic,” Saints boss Ronald Koeman said.
“We have more ball domination but we create four or five good positions to score and referee didn’t whistle for a clear penalty.
“We played much better than Liverpool. Sometimes you need that luck on your side.”
Rodgers added: “The player has gone over far too easy, no way that was a penalty. I thought Kevin Friend was excellent and I think all his decisions were right.
“We knew it would be a huge result to win here and it was.”
– Fighting spirit –
Elsewhere on Sunday, Mauricio Pochettino praised the fighting spirit of his Tottenham Hotspur players after Harry Kane rescued a dramatic 2-2 draw against West Ham United.
Pochettino’s team had fallen 2-0 behind at White Hart Lane as the Hammers struck through Cheikhou Kouyate and Diafra Sakho, but an error by goalkeeper Adrian allowed Danny Rose to get one back with nine minutes left.
And when in-form striker Kane was fouled in the area by Alex Song deep into second-half stoppage-time, he kept his composure to smash in the rebound after his spot-kick was saved for his 24th goal of a breakthrough campaign.
“We showed character, that’s the most important thing,” Pochettino said.
“Going into the last 10 minutes at 2-0 down, to finish the game 2-2 is something to be proud of.”
West Ham manager Sam Allardyce, frustrated that Kane went down easily under Song’s challenge for the penalty, claimed Tottenham were lucky to take a point from a pulsating London derby.
“They’re so lucky today. You can argue whether Alex Song has made enough contact for Harry Kane to go down, but when you’re desperate like Tottenham are, you get touched and the player is going to fall over,” Allardyce said.
There was more late drama at Goodison Park, where Everton snatched a 2-2 draw against bottom-of-the-table Leicester City thanks to Matthew Upson’s 89th-minute own-goal.
Everton’s Scottish striker Steven Naismith broke the deadlock in the 57th minute with a low scuffed shot that beat wrong-footed Leicester goalkeeper Mark Schwarzer.
But David Nugent equalised six minutes later when the Leicester forward tapped in after Everton goalkeeper Tim Howard weakly palmed Jamie Vardy’s cross into his path.
And Howard was to blame for Leicester’s second goal in the 70th minute as well when he misjudged a high cross, pushing it out to Vardy, who crossed for Argentine midfielder Esteban Cambiasso to fire home from close range.
That set the stage for a frantic finale in which Leicester defender Upson unluckily headed into his own net as he dived to try and reach a cross that was flicked on by Everton’s Romelu Lukaku.