Salah curled an unstoppable strike into the far corner
Southampton's disciplined display was proving tough to break down for Liverpool, but a stroke of brilliance from Salah gave Klopp's men the lead.
It was sloppy from Tadic at the edge of the box and Wijnaldum finally worked the ball to Mohamed Salah out wide.
The Egyptian cut onto his left foot and sent a bending strike past Forster and into the far corner to score his 13th of the season.