Radhi Jaïdi's youngsters, suffering the ill effects of two games in the space of four days, lost out 2-0 to their Reading counterparts in Premier League 2 on Saturday.
Jaïdi conceded that there were perhaps some 'tired legs' in the latter stages of the tie - incidentally when Saints let in both goals - but that his young side will learn from some routine mistakes made today.
And, despite chances created, suggested that his Under-23s need to remain working on their play in the final third, after drawing a blank in their previous two league matches.
"We didn't start as well as I'd have liked. But when we upped the tempo and started to play in patches of the first half, and more in the second, we looked better," Jaïdi said.
"We created chances from wide areas, and we got crosses into the box. It was unfortunate that none of those were converted.
"We had some tired legs at the end of the game, after the efforts midweek. There wasn't much time to recover.
"A lot of exertion, but the boys will have to learn how to play two games in a week.
"That's part of their development, knowing how to manage multiple games."