Under-23s boss Radhi Jaïdi was left to rue individual mistakes in the aftermath of his young side's Premier League 2 loss to Reading - their first league defeat of 2019.
A couple of second-half errors meant Saints were ultimately left empty handed, having taken the lead, and allowed their fellow title challengers the chance to claw back three points in the race for top spot.
The loss, while damaging, is far from fatal in terms of Saints' ambitions this year, though, but is does out added pressure on next week's encounter with Wolves, who are now only two points shy of Jaïdi's side in second.
"Of course I'm disappointed. When you lose it's disappointing," the Under-23s boss conceded. "But we always need to remember that with the younger boys, there's areas that always need to develop.
"We're trying to get the right mix, so they're at a level where they can compete. I thought today the first half was tremendous, we pressed them high and caused a lot of problems.
"We put a lot of effort in, and the goal came. Individual mistakes hurt us in the end - both the penalty and the second goal.
"We've had a great run of wins, and now we've had a loss along the way. Now the most important thing is we keep our feet on the ground and are always searching for ways to improve."