Manchester City piled the pressure on Premier League leaders Arsenal with a 4-1 win at St Mary's on Saturday teatime.
Erling Haaland added two more strikes to his ridiculous haul for the season, and it means he has now hit 30 Premier League goals this season - with nine games still to left play.
In-form Jack Grealish got himself on the scoresheet either side of the Norwegian's goals, while Julian Alvarez completed the victory from the penalty spot twelve minutes from time.
Sekou Mara did grab a consolation for Southampton, but Ruben Selles' men remain rooted to the bottom of the Premier League, with time running out.