Matt Gill was left frustrated at his Norwich City side's display after they were beaten 2-0 by Aston Villa in their Premier League 2 opener.
Kelsey Mooney's double succumbed City to a defeat in the west Midlands and although he said they created plenty of goalscoring chances, Gill was on the whole disappointed.
"It’s a real disappointing opening to the campaign," he said. "It was a weak performance, despite us creating quite a few chances in the first-half.
"We didn’t have the composure to finish them or pick out that final pass and play with a little bit of care in the final third.
"It was disappointing to go in a goal behind at half-time. I felt that we were going to create lots in the second-half and play with a bit more composure but unfortunately, we never really got going.
"We didn’t really have a go in the second-half and finished up with a bit of a whimper."
Next up for City's Development Squad is Reading at Colney next Monday (2pm) and Gill is hoping his young side can learn from their experience at the Banks's Stadium.
"The lads understand that that isn’t acceptable and the bottom line is, they need to be working harder for each other," he continued.
"We had a good week’s training and it really disappointing to have a defeat like that.
"There’s loads of stuff we need to put right. They’re a young group and they’re learning but they need to learn quickly."