Wayne Rooney's dismal start to life as Birmingham City manager continued as his side suffered a third consecutive Championship defeat at the hands of Southampton.
The new Blues manager can take some heart from a second-half fightback by his team after they had gone behind to goals from Taylor Harwood-Bellis, which replays showed to be offside, and Carlos Alcaraz.
Jay Stansfield pulled a goal back moments after being sent on as a substitute by Rooney, but Adam Armstrong's eighth goal of the season - five minutes from time - ensured it was 14 points from the last 18 for Saints.