Danny Ings' 13th goal of the season secured Southampton's third win in four matches as they beat Tottenham Hotspur 1-0 to move up to 11th in the table.
Cedric Soares headed wide before Ings gave Southampton the lead on 17 minutes.
Ings latched on to Jack Stephens' long pass and beat Toby Alderweireld before firing left-footed into the bottom-right corner from eight yards.
Nathan Redmond had an effort deflected over the crossbar before Jan Vertonghen shot over at the other end.
Harry Kane had a goal disallowed for offside before limping off injured, while Lucas Moura's deflected shot went wide of the post as Saints held on for a crucial victory.
Spurs are sixth with 30 points, five ahead of Southampton.
Southampton: 11 Jan v Leicester (A)
Spurs: 11 Jan v Liverpool (H)
Referee: Mike Dean. Assistants: Ian Hussin, Dan Robathan. Fourth official:Keith Stroud. VAR: Anthony Taylor. Assistant VAR: Harry Lennard.