Coventry City boss Frank Lampard said his side were not good enough in either box as they fell to a 2-1 defeat to Norwich.
The Sky Blues' lead at the top of the Championship is now just three points as they fell to a sixth-straight away league defeat.
Coventry led 1-0 at half-time after Romain Esse's angled finish but never fully got on top of the hosts who won through goals from Anis Ben Slimane and Ali Ahmed.
Ephron Mason-Clark hit the crossbar for the visitors and Lampard felt it was a game that got away from them, mainly through their own doing.
"We gifted them their goals. If you do that in the Championship you lose games. If you defend sloppily and make mistakes, teams score against you," Lampard told BBC Radio CWR.
"We created enough chances to score more goals but didn't. Defensive errors are a problem, something we've been good at this season.
"It was a great finish, good goal, and we went in at half time 1-0, so that's positive, but we came out [in the second half] and gave them some momentum.
"Some games aren't easy to control in the Championship. We had more possession than them, and created enough chances, but games are always won in both boxes.
"It's not easy to come here on a Monday night against a team in good form and try to control every aspect of the game."
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