Southampton moved to within a point of Premier League safety after beating fellow strugglers Leicester City and increasing the pressure on their manager Brendan Rodgers.
Carlos Alcaraz gave Southampton the lead after 35 minutes, firing an effort past Leicester keeper Danny Ward.
Three minutes earlier, Ward had saved Saints captain James Ward-Prowse's penalty after Timothy Castagne blocked a cross with his arm in the area.
Leicester's Harry Souttar should have levelled the match in injury time but could only head the ball against the crossbar after Southampton keeper Gavin Bazunu was beaten by a James Maddison cross.