Steve Spooner praised Blues Under-23s 'great character' after seeing them come from behind against Hull City to record a narrow 2-1 victory.
Blues dominated the first-half in particular, but were unable to make it count and Hull took the lead within minutes of the second-half restart.
But a penalty conversion from Odin Bailey and a 90th minute finish from substitute Kane Thompson-Sommers ultimately saw Blues home against The Tigers.
"I think justice was served in the end with the late goal," said Blues' Senior Professional Development Coach.
"You can have all the possession in the world but if you don't make it count, it counts for nothing.
"Whilst we had a lot of possession in the first-half, we didn't break them down enough.
"We spoke about it at half-time and the creative ways that we could do better with it, and then we came out after the break and started slowly and gave Hull a goal.
"Then we decided to change the shape because we thought we could get more joy playing with a 4-4-2 and expose them down the sides, and on most occasions we did that and we got quite a lot of joy from the wide areas.
"We also went man for man in the midfield and kept passing and probing and creating opportunities, and possibly with a bit better finishing and but some good goalkeeping from their 'keeper it could have been more.
"It was actually the first time since the opening game of the season that we have come behind, which showed great character."
Whilst Blues struggled at times to find that 'killer' pass to unlock a determined Hull defence, they largely dominated the midfield areas, with Ryan Stirk and Caolan Boyd-Munce in particular excelling.
"When we went man for man in the second-half we won the midfield battle," said Spooner.
"They (Stirk and Boyd-Munce) controlled it very well because they are clever footballers who can probe, and have got good short and long range passing.
"As an overall team we have created intelligent footballers who can see things and adapt, and that's exactly what we did today.
"The end goal is to produce footballers who can play in the right way and the Birmingham City way and we're doing that at the moment."