Manchester United ran out 1-0 winners on the south coast as Erik ten Hag secured the second win of his tenure as boss.
Bruno Fernandes' goal proved the difference between the two sides with United's defence standing firm in the face of late Southampton pressure.
Sportsmail runs you through the player ratings from a sunny, late August afternoon at St Mary's.
Southampton: 4-2-3-1
Gavin Bazunu – 7.5: Made a great save to keep out Anthony Elanga on 19 minutes and also denied Scott McTominay’s volley in the second half.