The Whites put six past the Saints’ defence, conceding twice late on but were in complete control for the vast majority of the contest.
First-team players, including captain Liam Cooper, Patrick Bamford, Luke Ayling, Junior Firpo and Crysencio Summerville all featured in the 6-2 rout, along with several promising youngsters.
Leeds welcomed 10,689 supporters into Elland Road, an attendance which matched similar crowds for Under-21 matches against Manchester United, Liverpool and Arsenal last season.
Here is a comprehensive fan gallery of Leeds supporters young and old, as well as unseen match pictures.
1. Sonny Perkins (Picture: Steve Riding)
Leeds United Under 21's v Southampton Premier League 2
Sonny Perkins 16-09-2022 Picture Steve Riding Photo: Steve riding
2. Darko Gyabi (Picture: Steve Riding)
Leeds United Under 21's v Southampton Premier League 2 Darko Gyyabi 16-09-2022 Picture Steve Riding Photo: Steve Riding
3. Rasmus Kristensen, Jesse Marsch and family watch Leeds U21s (Pic: Steve Riding)
Leeds United Under 21's v Southampton Premier League 2
Jesse Marsch watches the game Photo: steve riding
4. Leeds United fan with pin badge at Elland Road (Picture: Steve Riding)
Leeds United Under 21's v Southampton Premier League 2
Leeds United fans 16-09-2022 Picture Steve Riding Photo: Steve Riding
5. Archie Gray (Picture: Steve Riding)
Leeds United Under 21's v Southampton Premier League 2
Archie Gray
16-09-2022 Picture Steve Riding Photo: steve riding
6. Darko Gyabi makes a pass (Picture: Steve Riding)
Leeds United Under 21's v Southampton Premier League 2 Darko Gyyabi 16-09-2022 Picture Steve Riding Photo: Steve Riding