Grant Hanley hopes he and his Norwich City teammates will learn from their 4-3 home defeat to West Bromwich Albion.
Hanley skippered the side for the first-time at Carrow Road since being named new Club captain.
However, the Canaries were beaten 4-3 in a crazy match where they were the better side for large periods.
"It's a disappointing result, first of all," said Hanley. "I thought at times in the game, we were very good, especially in the first-half.
"It's good for us to score some goals but obviously, we're really disappointed with how we conceded the goals.
"It's early in the season and there should be no excuses but there was maybe a little lack of grit and determination to stop goals like that.
"We know it's something we need to improve on. We pride ourselves at being solid at the back but to lose four goals at home, we know it's not acceptable."
City went into the interval level with their opponents but they really should have been ahead after bossing the opening 45 minutes.
"We started really well and were in control of the game," added Hanley. "We got our goal and they came back into the game.
"We had the chance with the penalty but that's what you've got to learn from. We have to be a bit more ruthless and stay on top of the game.
"We don't need to neccesarily put the game to bed straight away but we need to stay on top and make sure we stay in-front."